Exposed Carbon Steel in Exhaust Weldment
Friday, September 4, 2009 at 3:42PM

As in an earlier post we explained, a concurrent benefit of electropolishing is the ability to expose a contaminated assembly or weldment with carbon/mild steel. The pictures below and "HERE" show that it is almost impossible to visually determine the difference between carbon/mild steel and stainless steel after welding. The heat patina (discoloration) and scale that is created during welding camoflages the two metals by coloring them almost the same. As you can see in the pictures it is immediately apparent that two different metals are present AFTER electropolishing.

TIP! Use a magnet to tell the difference between carbon/mild steel and iron and 300 series stainless steels!


Article originally appeared on electropolishing (
See website for complete article licensing information.