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The Daily Insight

How do you protect aluminum from corrosion?

Author

John Peck

Updated on April 04, 2026

Painting, anodizing or any surface treatment that forms a coating on the aluminium surface will protect the surface from pitting attack. In applications when you want to preserve the aluminium look and still have a surface resistant to pitting, a clear coat or thin anodic coating would be suitable surface treatments.

Does aluminum have a corrosion resistant coating?

AlumiPlate aluminum provides excellent corrosion protection particularly in salt and industrial acidic environments. The AlumiPlate Al plating can be used at temperatures up to 450 °C and higher. Other coatings cannot even be considered for high temperature exposure because of their lower melting temperatures.

What are the four protective coatings used on aluminum?

5 corrosion resistant metal coatings compared

  1. Anodising. The most popular method of improving corrosion resistance on aluminium is anodisation.
  2. PEO. Plasma Electrolytic Oxidation (PEO) involves the use of plasma discharges to transform the metallic surface of light metals.
  3. Chromate conversion coating.
  4. Paints.
  5. Powder coats.

How do you keep raw aluminum from oxidizing?

How to Protect Aluminum From Fading, Oxidation and Corrosion

  1. For architectural , painted or anodized aluminum, use Everbrite Coating.
  2. For automotive, marine, and highly polished aluminum, use ProtectaClear.
  3. For aluminum that needs antimicrobial protection like railings, use CrobialCoat.

Does aluminium corrode easily?

Aluminum is actually very prone to corrosion. However, aluminum corrosion is aluminum oxide, a very hard material that actually protects the aluminum from further corrosion. Aluminum oxide corrosion also looks a lot more like aluminum (dull gray to powdery white in color), so it isn’t as easy to notice as rusted iron.

What finishes can be applied to aluminium?

4 Types of Aluminium Finish

  • The mechanical finish. Aluminium can be mechanically finished like other metals, and usually with the same kinds of equipment.
  • The chemical finish. A chemical treatment can be applied to aluminium for various purposes.
  • The anodised finish.
  • The powder coating finish.

What is used to coat aluminium?

Aluminium coatings are surface coatings of metals which display excellent corrosion resistance. The process of producing this coating is called aluminizing, a thermo-chemical process that diffuses aluminium into the surface of metals. The most common material subjected to aluminizing is steel.

What finishes can you put on aluminium?

How to protect bare aluminum?

Method 1 of 3: Painting or Spraying on a One-Part Clear Coat Download Article Clean your aluminium. You can use a power washer to clean the aluminium surface you wish to protect. Neutralise the aluminium. Make a water solution of calcium carbonate or baking soda. Rub down the neutralized surfaces with xylene or denatured alcohol. Apply the clear coating. Re-apply the clear coating to refinish a surface.

What is anti – corrosive paint?

Composition: Anti corrosive paint is a composition of corrosion resistant pigments such as zinc chromate , lead chromate, zinc oxide , zinc dust, zinc chromate, or red lead. Linseed oil is used as a binder in the anti corrosive paint.

What is corrosion Guard spray?

WGMC Corrosion Guard is a light spray that stops rust and corrosion from forming on a metal surface. It accomplishes this by its ability to deposit a positive magnetic field to the surface of the metal.

What is aluminum coating?

Aluminum Conversion Coatings are non-decorative coatings applied to aluminum parts to achieve a thin, electrically conductive coating that will provide corrosion resistance. These coatings are also a great base coating for aluminum parts that require painting, as it will aid in the adhesion of the paint to the aluminum.