Is black anodized the same as blackening?
Jul 09, 2022
It's different.
Anodic oxidation is the electrochemical oxidation of metals or alloys. Aluminum and its alloy in the corresponding electrolyte and specific process conditions, due to the action of impressed current, aluminum products (anode) on the formation of a layer of oxide film process. Anodizing, unless otherwise specified, usually means anodizing sulfuric acid.
Blackening is a common means of chemical surface treatment, the principle is to produce a layer of oxide film on the metal surface, in order to isolate air, to achieve the purpose of rust prevention. When the appearance requirement is not high, the blackening treatment can be used, and the surface blackening treatment of steel parts can also be called blue
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