Stainless Steel Mill Scale

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Stainless steel mill scale.

Mill scale is bluish black in color. There seems to be conflicting opinions about whether the mill scale formed during production is helpful or harmful in resisting corrosion. This is true for powder coatings paints and other finishing techniques meant to protect the surface from corrosion. El geasy aa nasr mi 1990 influence of original structure on.

I often forge stainless which means it has real mill scale its all over dark gray. It doesnt interfere with tig welding. How do you remove mill scale from stainless steel. The mill scale on 304 is chromium oxide.

Cho s lee j 2008 metal recovery from stainless steel mill scale. Met mater int 14 2 193 196. The two most common technique used is shot blasting and scale breaker making the coil pass through series of rolls and making them bend at different angles. Mill scale is formed on the outer surfaces of plates sheets or profiles when they are being produced by rolling red hot iron or steel billets in rolling mills.

For this reason scale removal is an indispensable step in the pre coating process. I have been tig welding a lot of stainless for over 25 years now and have never cleaned it up before welding. To achieve a smooth durable coating mill scale must be removed from an iron or steel workpiece before application. Shot blasting a method used to clean strengthen and polish metal is a fast and cost effective way to remove mill scale.

I am a researcher studying corrosion resistant rebar specifically using stainless steel. Removing mill scale from iron or stainless steel. By microwa ve heating. Mill scale formation on stainless steels 2001.