Stainless Steel Mill Scale

To achieve a smooth durable coating mill scale must be removed from an iron or steel workpiece before application.

Stainless steel mill scale.

There seems to be conflicting opinions about whether the mill scale formed during production is helpful or harmful in resisting corrosion. It is usually less than 0 1 mm thick and initially adheres to the steel surface and protects it from atmospheric corrosion provided no break. Cho s lee j 2008 metal recovery from stainless steel mill scale. How do you remove mill scale from stainless steel.

Mill scale is bluish black in color. Mill scale often shortened to just scale is the flaky surface of hot rolled steel consisting of the mixed iron oxides iron oxide iron oxide and iron oxide. El geasy aa nasr mi 1990 influence of original structure on. Scales and rust formed on steel coil s surface is traditionally removed by two process.

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. The mill scale on 304 is chromium oxide. I am a researcher studying corrosion resistant rebar specifically using stainless steel. Mill scale formation on stainless steels 2001.

I often forge stainless which means it has real mill scale its all over dark gray. This is true for powder coatings paints and other finishing techniques meant to protect the surface from corrosion. I have been tig welding a lot of stainless for over 25 years now and have never cleaned it up before welding. Met mater int 14 2 193 196.

For this reason scale removal is an indispensable step in the pre coating process. 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. Wholesale trader of stainless steel mill scales ss 304 316 mill scale waste offered by ganga steels delhi. Shot blasting a method used to clean strengthen and polish metal is a fast and cost effective way to remove mill scale.