← Glossary

Passivation Efficiency

The passivation efficiency indicates how well a chemically produced layer protects stainless steel. It is determined by measurements or tests.

Physicochemical Mechanism of Action

Passivation of stainless steels forms a thin, stabilized layer on the surface that blocks oxygen and other corrosive substances. This prevents the steel from flaring and protects it from corrosion.

Metallurgical Relevance & Risks When Welding

A high passivation efficiency means the layer is well stabilized and has a long service life. A low efficiency can lead to accelerated corrosion and cause the material to fail prematurely.

Workshop Practice & Action Instructions

To measure passivation efficiency, use electrochemical impedance measurements or outdoor exposure tests. If efficiency is low, polish the steel surface or apply a new chemical passivation treatment.

MetallurgieSchweißtechnik

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