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Passivation – Under certain conditions, when the potential of 3d printing metal moves in the positive direction due to an external anodic current or a local anodic current, the state of the originally dissolved active metal surface undergoes a certain mutation (in the form of an oxide film or an attached film).
Due to this mutation, the regularity of the anode dissolution process has also undergone qualitative changes, and the dissolution rate of the metal has dropped sharply. This mutation process of the metal surface state is called passivation.
The role of chromate light passivation:
①Improve the structural composition and gloss of the surface of the galvanized layer;
② Improve the corrosion resistance and service life of the galvanized layer.
③Prevent “white rust” from occurring during transportation and storage;
④ Make an excellent base for applying other coatings.
Link to this article：Chromate light passivation
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