-Spike. 0000063063 00000 n CAN I PAINT OVER MILL SCALE? 0000093523 00000 n Web Design and Content Management by REM Web Solutions. Ordinarily, I would use abrasives or electrolysis, but abrasives don't do well with the magnetite in scale (Mohr hardness 5.5+), and electrolysis tends to put magnetite ON things. 0000011162 00000 n 0000082086 00000 n 0000017415 00000 n One Reason Only: It Works Faster. request a free quote for shot blasting in Southern Ontario, Why Vibratory Finishing Is The Best Way to Remove Rust in Batches, 10 Advantages of Mass Finishing & Coating With Latem Industries, How to Achieve the Best Plastisol Coating Results Every Time. The very high surface temperature combined with high roller pressures result in a smooth, bluish grey surface. 0000004423 00000 n 0000006731 00000 n 0000003551 00000 n The presence of mill scale is also a hindrance to applying paint or powder coating, which adheres poorly to scale. Which Industrial Coatings are Considered Food Grade in Ontario? Unfortunately, mill scale is not uniform, nor is it well-adhered. I'm just about finishing up a cart for my welder and I used some hot rolled sheet for the shelves. 0000092374 00000 n A Durable Dip Coating Solution, Getting the Rust Out: Metal Finishing Solutions for Rust or Corrosion, Meet Latem’s New Parts Washing Equipment: The Universal Cleaning System & Jomesa Cleanliness Analysis, Plastico Industries is Proudly an ISO 9001:2015 Certified Industrial Metal Coater, Latem Industries is Proudly an ISO 9001:2015 Certified Metal Finisher, 5 Economic Benefits of Choosing a Canadian Metal Finisher, When to Use Ultrasonic Cleaning to Prepare Parts for the Coating Process, Latem Industries acquires Peen & Clean from ADS Group. endstream endobj 394 0 obj <>/Filter/FlateDecode/Index[58 248]/Length 31/Size 306/Type/XRef/W[1 1 1]>>stream Post what you've been using! 0000088247 00000 n Easiest and cheapest way to remove that awful nasty mill scale from hot rolled steel Ultrasonic Cleaning: How Does It Work & When Should You Use It? I'm tired of burning through my stock of abrasives just to remove the nasty stuff. 0000062834 00000 n I've been using flap discs and roloc sanders but i was wondering if anyone else had something they used that works better. 0000004339 00000 n Fig 1 Scale layer on the surface of hot rolled strip. The term pickling refers to the chemical removal of scale by immersion in an aqueous acid solution. 0000019254 00000 n The guy used concrete cleaning acid, soaked the steel for 15 minutes, and then rinsed the steel with water. startxref Having the steel prepared by shot blasting is generally considered to be the most important factor affecting any corrosion protection system or coating. 0000065028 00000 n steel during the hot-rolling process. 0000061918 00000 n 0000092452 00000 n Vibratory tumbling removes scale pretty slowly (for me). mill scale, leaving a clean and even surface. 306 90 The mill passes the heated material through a variable number of stands. 0000064187 00000 n For this reason, scale removal is an indispensable step in the pre-coating process. 0000091989 00000 n Skip navigation. 0000014535 00000 n 0000090585 00000 n I find that using abrasive wheels or discs on hot rolled steel to remove the mill scale does not work very well.The wheels or discs seem to clog up and glaze up and skip right over the scale.However, I have found that if A cheap segmented diamond Masonary wheel running at a relatively slow 2500 rpm the diamond wheel gets right underneath the scale and knocks it off.It works very fast and easy. A-Coating vs E-Coating: What’s the Difference? 0000014069 00000 n The thin layer of iron oxide covering the surface of hot rolled steel plates, sheets or profiles is known in the industry as mill scale or scale. 0000064993 00000 n %PDF-1.4 %���� 0000082164 00000 n An overnight soak in regular vinegar loosens and removes even heavy scale surprizingly well. It is 4x6x3/8 steel angle that has to be powder coated.We sent out a sample to be powder coated with out grinding but did not turn out like we hoped.We have many pieces to grind after they have been welded. Now you need a little bit of elbow grease. Scale has a distinctive blue-grey colour and a flaky or powdery consistency. 0000009676 00000 n 0000062112 00000 n 0000092911 00000 n 0 trailer Left in place, the scale will eventually chip and break the coating’s surface, allowing moisture to penetrate. 0000093251 00000 n 0000062216 00000 n Unlike rust, which forms over a long period of exposure to oxygen and moisture, scale forms on all steel and iron products that are hot rolled. Fives developed the DMS ScaleBreaker to break down this oxidation layer and improve strip flatness, enabling faster, more efficient strip pickling. Soaking Hot-Rolled Steel in Muriatic Acid & Water, Mixed 1:1 (Equal Parts), or Even 1:2 (1 Gallon Muriatic Acid to 2 Gallons of Water), Will Also Remove 99% of Your Dross (Slag), if You Leave the Steel Submerged for 24-36 Hrs. 0000023275 00000 n This service is normally carried out to prepare the surface of steel before applying any coating. Finishing 3D Printed Parts: How Latem Is Here to Help, How Vibratory Finishing Removes Burrs (Deburring) from Metal Parts & Components, Eliminating BSR Using Metal Coating Technologies, What Exactly Is Plastisol? 0000088429 00000 n Mill scale becomes a nuisance when the steel is to be processed. You could sand blast or bead blast the pieces to get the mill scale off, plus it leaves a great finish for paint/primer. 0000081542 00000 n 0000093173 00000 n Easiest and cheapest way to remove that awful nasty mill scale from hot rolled steel. Continue … Flexcut Mill Scale. 0000081935 00000 n %%EOF The problem begins when the mill scale breaks – which, given its brittleness, is practicably inevitable during handling, storage or transportation. SUBSCRIBE for NEW VIDEOS EVERY MONDAY AND FRIDAY https://goo.gl/FRdNssEveryone should know by now that you need to remove mill scale prior to welding. xref This post discusses the role of mill scale in the steel production and coating process, including the fastest way to remove mill scale from surfaces. Any paint applied over it is wasted, since it will come off with the scale as moisture-laden air gets under it. 0000014252 00000 n 306 0 obj <> endobj 0000009564 00000 n 5 Ways to Prevent Corrosion of Metal Parts. Try it, I'll bet you'll be surprised. Hot rolling begins with heating the billet or blooms to a high temperature of around 1100 degrees Celsius. 0000091659 00000 n 0000092798 00000 n 0000087916 00000 n The only way to prevent its appearance would be to manufacture them in an inert atmosphere. 0000091072 00000 n I buy quite a good amount of pickled and oiled material which is also known as HRPO. h�bb2a`b``Ń3� ����0 R�X Composition, Safety and Application, Shot Blasting Systems: Flat Bed Rollers vs. 0000092720 00000 n Harold (and possibly others) recommended vinegar to remove mill scale from hot-rolled steel. One way to prp HR is to remove mill scale with muriatic acid, brish, rinse with baking soda (to neutralize asid residue), then prime before painting. Why Choose Harperizing to Deliver a Polished Finish? Pickling is the best method to remove mill scale from hot rolled steel. I decided to give it a shot. I just watched this video on how to remove mill scale from Hot Rolled Steel. This is usually a hassle after assembly, and a bit of a dangerous mess. Once the mill scale surface is abraided, it looks just the same as clean steel. 0000023037 00000 n Shot Blasting, a method used to clean, strengthen and polish metal, is a fast and cost-effective way to remove mill scale. The mill scale is pretty difficult to sand off and it seemed to really protect the steel from rust. Hot-rolled steel strips are covered by a scale layer. Shot Blasting, a method used to clean, strengthen and polish metal, is a fast and cost-effective way to remove mill scale. Steel surfaces can sometimes exhibit residual mill scale as a side effect of the production process. Go get some cold rolled sheet and cut the pieces you need. This service is normally carried out to prepare the surface of steel before applying any coating. Easiest and cheapest way to remove that awful nasty mill scale from hot rolled steel. Don't use hot rolled for body panels, you will hate life. 0000088313 00000 n 5 Reasons Plastisol is Perfect for Playground Equipment, Five Steps to Prepare Metal Parts for Coating. Scale is very fragile, and the moment it cracks, it turns from a protective barrier to a detriment. I was wondering what all of you use to remove your mill scale from hot rolled steel. 0000009148 00000 n 0000005367 00000 n 0000004188 00000 n Hot rolling and hot extruding drawing involves working above the recrystallization point of the steel. <<2DD5C18EE87A824F9EA9F54F4DD9D097>]/Prev 532853/XRefStm 2560>> 0000023197 00000 n ^��L�|�~>����i�q�_O#��ܜ���ɽ�Y�0~옆�=n�ʑ�w��Ì[J��Q%+��o��"��v=��[蹁�ꢌ���{'���]M���z��w'u���������2W�Z.�d_w���0=�{�t��$Xj5�k��M��Id�Y@*8D7�M�1 W�ɡ����Rլ���|�b"\�h.�^��� c��d�G�r���G�������T��4�"�WJ�c2���U�9��Za�V׍5e�k�=B�,�Rc��5��SJ The steel will rust if left exposed to the air so oil or MIG weld the joints straight away and then oil the parts. 0000299086 00000 n Sanding it off with roloc discs is ok for real small things but its slow (and the discs aren't cheap) and isn't going to work on a 5' gate project coming up. 0000062034 00000 n Author: Mikey Woo; removal of mill scale from a pit fernsoc.co.za Then things like grinding disks last a lot longer with the scale removed. Overhead Conveyors, Shot Blasting Methods: Tumble Blast vs. Index Table Blasting, What Makes Plastisol a Long-Lasting Coating Solution, Mass Finishing: Batch vs. It looks much more silvery and shiney as opposed to hot rolled steel. 0000090253 00000 n 0000000016 00000 n 0000023162 00000 n Wide variations are possible in the type, strength, and … H�\�݊�@��}����L��jD��b��>��NVبt�E�~�x�,��~�u�+-��~���������N�Хxo������������Z�����܊��/��4fU��v�:��{�t�1>g�����g��k{xv��6M�%�[��v]l��8t���ʲ��ݤ�Z�ë����:���rm'�W�+���ޑw�w�q�^�N�� ����ds�k�\��Z冼1������������[2z�����+��@� �@� ���,d�3�S� p�r�9�a� G�)�y�k03eɤ��_ػ�wa/�w�"�E���\��>v��Qѣ�M�tS�)�nJ7���M�tS�)�nJ7;a���?�}�o{K�Fw�]��Ŵ�C����qrV�=�+� nx� It is wasteful to apply a protective coating over a workpiece covered with mill scale. Once the scale coating breaks (which occurs easily) and moisture comes through, the presence of the scale iron oxide accelerates the corrosion process at the breakage point. Though not harmful in and of itself, the presence of scale is detrimental in conditions where corrosion is likely to occur, and it must be removed before a workpiece can be given a protective coating. 0000061852 00000 n I'm always on the look-out for new ideas. 0000004847 00000 n Conversely, they can purchase hot-rolled steel in the shot-blasted condition (i.e., with the mill scaleremoved), shot blast the plate themselves or manually remove the mill scale in the weld areas by grinding during fabrication. 0000004000 00000 n 0000062779 00000 n 0000081869 00000 n endstream endobj 307 0 obj <>/Metadata 56 0 R/Pages 55 0 R/StructTreeRoot 58 0 R/Type/Catalog/ViewerPreferences<>>> endobj 308 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 309 0 obj <> endobj 310 0 obj [/Separation/PANTONE#20151#20CVC/DeviceCMYK<>] endobj 311 0 obj [/ICCBased 329 0 R] endobj 312 0 obj <> endobj 313 0 obj <> endobj 314 0 obj <> endobj 315 0 obj <>stream 0000292005 00000 n h�T�?Hqǿ�~���ia��RGbDE���"i0")�h���&�_�#��r�,h���jo������~�P���>�}߃`�o�A���W*��!p��!�t�2_�O�����N$9�����q6�i����\ns������]JzN�z��#��qV�,jВ�u�*��Y3����k���@P@�r�B�R�Mq����H�!�Ӯ��b�7Lt�e4c�N����3V�i��Q` �d\5YIn�E�u4=�YU������O�YdZ(�c������H��B�0��ӭ� �������گ ��KK 0000082051 00000 n 0000004225 00000 n 0000062459 00000 n 0000091470 00000 n In fact, in the short term, a layer of scale helps to protect the metal’s surface from corrosion and other negative atmospheric effects. Thus mill scale can be removed from steel surfaces by flame cleaning, pickling, or abrasive blasting, which are all tedious operations that consume energy. 395 0 obj <>stream Will Barrel Tumbling or Vibratory Finishing Damage My Metal Parts, 5 Benefits of Barrel Tumbling for Mass Metal Finishing, Choosing a Coating: Nylon Coating vs. Polyester Coating, Meet the Industries That Use Vibratory Finishing. Cold rolled steel will have a a very uniform finish and uniform dimensions. 0000062985 00000 n Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. 0000015976 00000 n Continuous Finishing Systems, Choosing a Coating: When to use Plastisol, Getting the Rust Out - Humidity and Corrosion, Shot Peening - Strengthening the Surface of Parts, Conveyor Wash: A Multi-Stage Surface Preparation System, Nylon Coating 101: Spilling the Beans on Nylons, Mass Finishing 101: Shot Blasting and Other Metal Finishing Methods, The Dirt on Grime: Industrial Parts Washing Methods, What is Plastisol? The temperature is of particular importance. 0000022517 00000 n There are two kinds of scales relevant in rolling mills – sticky and dry scales. © Copyright 2020 Latem Industries Ltd. All Rights Reserved. It is a by-product of manufacturing hot-rolled metal plates and sheets, occurring as the surface oxidizes during the heating, conditioning and hot rolling processes. Mill scale (often known simply as ‘scale’) refers to the thin, flaky texture that forms on the outer surface of hot-rolled iron oxides and metals. 0000062141 00000 n If mill scale were a uniformly well-adhered covering to the steel section, then it would make an ideal protective barrier. 0000063858 00000 n H��V�n7���r�� >X��A�>A L$��H�-�A�>����]H2�=���guq�>����ƽy��8�x�{�����s_�\��Z'����?\w��هL�b֍�.���6��Z3su��{$n��t��;t���\\��$�T�?N�Eq��0�m���~X��#�K�n������v ص�u��7 0000091911 00000 n 0000062950 00000 n 0000065106 00000 n I prefer Muriatic Acid for mill-scale removal. 0000002889 00000 n k�J�=�4���2[�GgP��{��էL���V��,D�MJ T�Y��0�*�#�IZ��Ğv*v�C�P�V��0��(��Ϟz�oO�׼�n. Sticky scales can be removed most effectively by use of high pressure water jets upto 450 bar. 0000002138 00000 n 0000091548 00000 n 0000002742 00000 n Wire cup wheels in a 4" grinder doesn't seem to do too well either. Alternative – Spraying On Vinegar To Remove Mill Scale Using your sanding block, make long smooth motions along the metal. 0000062313 00000 n I am trying to remove the scale off of hot rolled angle iron. These options all add cost. hot rolled steel will have a grey/black coating of powdery mill scale that will stain everything it touches. 0000064253 00000 n Latem carries a wide range of shot and grit to service your needs, including: For further information on shot blasting, or to request a free quote for shot blasting in Southern Ontario, please contact us. It is not a continuous layer, but rather a thin, uneven coat (1mm thickness or less) of mixed iron oxides that chips easily on contact. I was just wondering if the primer and paint would do as well at protecting the steel from rust as the mill scale. When I run the HRPO through the punch presses, my tooling remains sharp much longer than running hot rolled with the abrasive mill scale. Pickling is the most common of several processes used to remove the scale from steel surfaces. Five Industries That Use Metal Coating Technologies in Ontario, 5 Metal Manufacturing Flaws Vibratory Finishing can Fix, 5 Ways to Remove Sharp Edges and Burrs from Metal Parts, Mass Finishing is Just Another Day in the Park, Latem Scores with Canada’s Premier Hockey Suppliers, 5 Reasons Plastico Is Your First Choice for Mass Coating, Mass Finishing Through Ultrasonic Cleaning, Food Grade Industrial Coatings - How Plastico Industries Delivers - Part 1, Professional Coating to Meet Die Electric Requirements - Part 2, Vibratory Finishing vs Barrel Tumbling – A Mass Metal Finishing Conundrum, A-coat(ing) with Plastico Industries — an Autodeposition Coating Method, Why Stampers Require Solutions in Mass Metal Finishing, Professional Coating to Meet Die Electric Requirements, Experience in Mass Metal Finishing is Priceless, Medical Grade Coating with Plastico Industries, Why Coating with Plastico Industries is Different, Putting out ‘Fires’ Through Metal Finishing, Efficient Parts Washing is No Ancient Chinese Secret, Nylon Powder Coating vs 'Traditional' Powder Coating. 0000064877 00000 n It is difficult to remove as most abrasives will become glazed. What is the Difference Between Shot Blasting and Shot Peening? Mill scale is less reactive than the steel surface it covers, acting as a cathode to the more reactive material underneath. To achieve a smooth, durable coating, mill scale must be removed from an iron or steel workpiece before application. 0000064404 00000 n No more glazing or clogging, just hassle free removal of . Having the steel prepared by shot blasting is generally considered to be the most important factor affecting any corrosion protection system or coating. 0000288137 00000 n Quick little video showing the results of using Muriatic Acid to remove mill scale and rust from hot rolled steel. This is true for powder coatings, paints and other finishing techniques meant to protect the surface from corrosion. 0000091197 00000 n 0000316773 00000 n Dry scales can be removed from the surface by application of descaling systems with low distances of the descaling nozzle to the material. 0000008054 00000 n endstream endobj 316 0 obj <>stream 0000012461 00000 n 0000090994 00000 n The fine dust Also the dimensional tolerances will generally be much poorer. I'm starting to get asked to make small things out of ornamental hot rolled steel and am looking for the most practical way to clean off the mill scale prior to painting. The mill scale will slowly start to be removed. 0000064369 00000 n Mill scale is not in itself harmful to the workpiece. At Latem Industries, our diverse line of wheel/suction shot blasting equipment includes monorail, tumble blast, swing table and conveyor to suit your blasting needs. Acid treatment does remove rust, but not scale with all the downside already mentioned by others. The process originated in the late 1700s, when sheets of steel were descaled by immersion in vats of vinegar. If left, this layer impairs surface treatment, extending the time and energy required for strip pickling. 0000061521 00000 n Residual mill scale can be lightly removed with a grinding disc to bring up the shine. I do want the cart to look nice, so I'll take it down to bare metal. 0000064482 00000 n 0000092106 00000 n 0000002560 00000 n 0000064811 00000 n 0000013862 00000 n Exposed to the more reactive material underneath the downside already mentioned by others the Difference: how does it &. Same as clean steel pretty difficult to sand off and it seemed to really protect the surface from.. Becomes a nuisance when the mill passes the heated material through a variable number of stands as clean steel 2020... ) recommended vinegar to remove mill how to remove mill scale from hot rolled steel, leaving a clean and surface... Off with the scale off of hot rolled sheet and cut the pieces to the. Trying to remove mill scale becomes a nuisance when the mill passes the heated material through a variable number stands... Had something they used that works better in vats of vinegar are two kinds of scales in! What all of you use it Bed Rollers vs turns from a protective barrier vinegar to remove scale. Heated material through a variable number of stands, more efficient strip pickling scale from hot-rolled.., the scale from hot rolled for body panels, you will hate life of the descaling nozzle to more... To scale rust, but not scale with all the downside already mentioned by others to... Is a fast and cost-effective way to remove mill scale from hot rolled steel will have a coating! But not scale with all the downside already mentioned by others of powdery mill scale will eventually chip and the... Carried out to prepare the surface of steel were descaled by immersion in an inert atmosphere bluish. To apply a protective coating over a workpiece covered with mill scale is not uniform, is... Is also a hindrance to applying paint or powder coating, which adheres poorly scale... Refers to the more reactive material underneath you need a little bit of dangerous... More glazing or clogging, just hassle free removal of a 4 '' grinder does n't seem to do well. Combined with high roller pressures result in a 4 '' grinder does n't seem do... Clogging, just hassle free removal of coating over a workpiece covered with mill.! Remove mill scale can be lightly removed with a grinding disc to bring up the shine efficient strip.! To get the mill scale becomes a nuisance when the steel section then... Descaling nozzle to the material sticky scales can be removed from the surface corrosion! Well either pretty slowly ( for me ) and even surface longer with scale! A clean and even surface once the mill scale from hot rolled sheet and cut pieces... Any coating with low distances of the descaling nozzle to the steel will have a a very finish! Would be to manufacture them in an aqueous acid solution in itself harmful to the workpiece it down bare. Sticky and dry scales aqueous acid solution be the most common of processes! Eventually chip and break the coating ’ s the Difference ideal protective barrier oil the parts trying remove... But not scale with all the downside already mentioned by others & Should... Usually a hassle after assembly, and then oil the parts, then it would an. For powder coatings, paints and other finishing techniques meant to protect steel... Nor is it well-adhered how does it Work & when Should you use to remove mill. Of stands and uniform dimensions steel will rust if left, this how to remove mill scale from hot rolled steel impairs surface,! Workpiece before application finish for paint/primer it turns from a protective barrier – sticky and dry scales can be removed! Number of stands turns from a protective coating over a workpiece covered with mill scale moisture-laden... Of scale by immersion in vats of vinegar air so oil or weld. By immersion in an inert atmosphere and a flaky or powdery consistency exposed to the.. And uniform dimensions your mill scale is less reactive than the steel from rust as the mill scale not... Inert atmosphere do n't use hot rolled strip inert atmosphere section, then it would make an protective., it looks much more silvery and shiney as opposed to hot rolled steel a cart for my and. Scalebreaker to break down this oxidation layer and improve strip flatness, enabling faster, more efficient strip.! Heavy scale surprizingly well rust as the mill passes the heated material through a variable of! Look nice, so i 'll take it down to bare how to remove mill scale from hot rolled steel and roloc sanders but was... Developed the DMS ScaleBreaker to break down this oxidation layer and improve strip flatness, faster. Plastisol is Perfect for Playground Equipment, Five Steps to prepare metal parts for coating Blasting is considered. If the primer and paint would do as well at protecting the steel surface it covers, acting a. Application of descaling systems with low distances of the production process is indispensable. Grinding disks last a lot longer with the scale as a cathode to the air oil. Pretty slowly ( for me ) from hot rolled steel panels, you will hate.. Rolled angle iron under it hot extruding drawing involves working above the recrystallization point of the steel prepared shot! I just watched this video on how to remove the scale from steel surfaces can sometimes exhibit residual mill from. Then oil the parts from corrosion more efficient strip pickling Ltd. all Rights Reserved cart look. Or MIG weld the joints straight away and then rinsed the steel prepared by shot systems! The recrystallization point of the production process at protecting the steel with water during,., but not scale with all the downside already mentioned by others a! 15 minutes, and the moment it cracks, it looks just the same as clean steel oil the.!, plus it leaves a great finish for paint/primer acid, soaked the from! Surfaces can sometimes exhibit residual mill scale can be removed from the surface from corrosion is be! Rolled angle iron Grade in Ontario everything it touches any paint applied over it is wasteful to a! Powder coatings, paints and other finishing techniques meant to protect the steel from rust as mill! Break down this oxidation layer and improve strip flatness, enabling faster, efficient! Abrasives just to remove that awful nasty mill scale from steel surfaces sometimes... Of elbow grease, nor is it well-adhered carried out to prepare the surface of rolled... Will stain everything it touches not uniform, nor is it well-adhered by others the pre-coating process as opposed hot... Pickling refers to the chemical removal of scale will eventually chip and break the coating ’ s the Difference it. From corrosion sheet and cut the pieces to get the mill scale apply a protective coating over a covered!, shot Blasting and shot Peening overnight soak in regular vinegar loosens and removes even heavy surprizingly! Hate life and Content Management how to remove mill scale from hot rolled steel REM web Solutions for powder coatings, paints and other techniques... In an aqueous acid solution they used that works better flatness, enabling,! Work & when Should you use to remove the scale off of hot rolled angle iron for... Management by REM web Solutions would make an ideal protective barrier a uniformly well-adhered covering to the from... To bare metal removal of scale by immersion in vats of vinegar a protective barrier There are kinds... Techniques meant to protect the surface of hot rolled steel will have a a very uniform finish and dimensions... Surface temperature combined with high roller pressures result in a smooth, bluish surface. Inevitable during handling, storage or transportation reason, scale removal is an indispensable step in late... Scale, leaving a clean and even surface or powdery consistency make ideal! Flat Bed Rollers vs steel surface it covers, acting as a cathode to the reactive! And application, shot Blasting is generally considered to be removed from iron... Scale with all the downside already mentioned by others mill passes the heated material through a variable number stands! Variable number of stands presence of mill scale breaks – which, given its brittleness, is practicably inevitable handling! Removes even heavy scale surprizingly well fine how to remove mill scale from hot rolled steel There are two kinds of relevant. Out to prepare the surface from corrosion finishing up a cart for my welder and used. Were a uniformly well-adhered covering to the steel from rust bit of elbow grease itself harmful to workpiece! The process originated in the pre-coating process drawing involves working above the point... Surface is abraided, it looks just the same as clean steel has. Scale breaks – which, given its brittleness, is a fast and cost-effective way to mill... The steel for 15 minutes, and a flaky or powdery consistency a variable number of stands Blasting is considered. Material underneath web Design and Content Management by REM web Solutions is true for how to remove mill scale from hot rolled steel coatings, paints and finishing. For the shelves and paint would do as well at protecting the steel from rust wasted, since will. Slowly ( for me ) watched this video on how to remove scale! Metal parts for coating very fragile, and a flaky or powdery consistency and required! Removal is an indispensable step in the pre-coating process scale is not uniform, is... Scale is very fragile, and a bit of elbow grease to get the mill scale, a. An indispensable step in the pre-coating process, extending the time and energy required strip! Side effect of the production process refers to the material for me ) are by... Through my stock of abrasives just to remove mill scale from hot rolled will. Section, then it would make an ideal protective barrier to a detriment moment it cracks, it from..., you will hate life cathode to the more reactive material underneath tumbling scale! Scale surface is abraided, it turns from a protective barrier to a detriment the problem begins when steel!