PASSIVATIONAPT offers passivation services, which is the treatment of stainless steel or titanium surfaces with our proprietary processes and solutions. Passivation removes contaminants and promotes the formation of the passive film on a freshly created surface.
APT’s passivation treatments penetrates and cleans the steel surface and removes free iron contaminants. We use care in developing and using passivation treatments to ensure the selected treatment will target the contaminant. Passivation will also aid in the rapid development of the passive oxide film on the metal's surface. Passivation does not usually result in a change in appearance of the metal’s surface.
The corrosion resistance of stainless steel is affected by the roughness of the surface after machining or polishing. As the surface roughness increases above an Ra value of approximately 0.5 microns, a significant decrease is corrosion resistance is obtained. 0.5 microns Ra roughly corresponds to the surface produced by grinding with a 320 grit wheel. Either passivation or electropolishing can be used to improve the corrosion resistance of mechanically machined and polished surfaces.
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