Is Black Anodized The Same As Blackening?

It's not the same.

Anodizing is the electrochemical oxidation of metals or alloys. Aluminum and its alloys in the corresponding electrolyte and specific process conditions, due to the action of applied current, on aluminum products (anode) to form a layer of oxide film. Anodizing, if not specified, usually refers to sulfuric acid anodizing.

Blackening is a common means of chemical surface treatment. The principle is to produce a layer of oxide film on the metal surface to isolate the air and achieve the purpose of rust prevention. Appearance requirements are not high when you can use black treatment, steel parts of the surface black treatment, also known as blue.

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