Methods
Anodizing
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Anodizing is an electrolytic passivation process that thickens the natural oxide layer on the surface of a metal part, most often aluminum, to improve its corrosion resistance and surface hardness. First used industrially in 1923 to protect aircraft parts, it remains a standard surface treatment in aerospace and consumer goods manufacturing.
Facts
Core PrincipleAn electric current is passed through an electrolyte with the metal part as the anode, growing a thicker, more durable oxide layer on its surface than would form naturally. 1 Cross-Tradition Connections
Sources
1. Anodizing (Wikipedia)
Wikipedia contributors, Wikimedia Foundationlead sentenceQuote, lead sentence
Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.
1. Anodizing (Wikipedia)
Wikipedia contributors, Wikimedia FoundationHistory sectionQuote, History section
Anodizing was first used on an industrial scale in 1923 to protect Duralumin seaplane parts from corrosion. This early chromic acid-based process was called the Bengough-Stuart process.
1. Anodizing (Wikipedia)
Wikipedia contributors, Wikimedia FoundationAssociated With: Aluminum, Aluminium sectionQuote, Associated With: Aluminum, Aluminium section
Anodic films are most commonly applied to protect aluminium alloys, although processes also exist for titanium, zinc, magnesium, niobium, zirconium, hafnium, and tantalum.
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