Alodizing is described as which type of treatment?

Alodizing is described as which type of treatment?

• A. Electrolytic coating
• B. Thermal diffusion coating
• C. Mechanical plating
• D. Non-electrolytic chemical treatment

Answer: (D)

Alodizing is a chemical conversion coating applied to aluminum that forms an oxide film through a chemical reaction in a solution, not by electrical current. That’s why it’s described as a non-electrolytic chemical treatment. It differs from anodizing, which is an electrolytic coating formed by passing current through the metal in an electrolyte. It also isn’t a thermal diffusion coating (which relies on high-temperature diffusion of another material) or mechanical plating (deposition by mechanical action). So the key idea is that alodizing uses a chemical bath to convert the surface to a protective oxide layer without electricity.

Alodizing is a chemical conversion coating applied to aluminum that forms an oxide film through a chemical reaction in a solution, not by electrical current. That’s why it’s described as a non-electrolytic chemical treatment. It differs from anodizing, which is an electrolytic coating formed by passing current through the metal in an electrolyte. It also isn’t a thermal diffusion coating (which relies on high-temperature diffusion of another material) or mechanical plating (deposition by mechanical action). So the key idea is that alodizing uses a chemical bath to convert the surface to a protective oxide layer without electricity.