Stainless Steel Tank Passivation

What is stainless steel tank passivation?

Passivation is a finishing process widely-used to prevent corrosion. In stainless steel, the passivation process removes free iron from the surface. The chemical treatment leads to a protective oxide layer that is resistent to the chemical reaction with air which causes corrosion.

This protective oxide layer will prevent microscopic pitting of the stainless steel, which ultimately will lead to a buildup of difficult to clean soils (organic & inorganic). Passivation also makes general cleaning between hauls easier as it speeds up cleaning times to remove these soils.

Should I have my tanks passivated?

Stainless steel cargo tanks should be passivated at least once a year. The first passivation should be before the new tank enters service. This will help remove mill spatter, filings, and other contaminants that can contribute to corrosion.

Passivation makes the surface of a stainless steel barrel passive so it will resist corrosion. As the passivating solution circulates in the cargo tank, rust and stains are removed. A chrome oxide layer will form on the tank surface which will protects against corrosion.

The oxide layer will break down over time, which is why the passivation process should be repeated annually.

Passivation is a 24 hour process. KEHL Solutions is the area's top provider of passivation services. Call today to schedule passivation for your tankers.