Free iron corrodes easily. Without passivation, iron or iron oxide exists on the surface of stainless steel. When any machining or fabrication operations are performed, the condition is worsened. Aside from iron being deposited by tooling, it is also being entrapped underneath the skin created by the mechanical operation. In the metal industry this surface impregnated steel is referred to as "free iron".

Our Passivation line is capable of producing over 100,000 pieces of HDD covers/components per day.