Corrosion resistance

Both qualitative and quantitative characteristics are used to estimate corrosion rate. Changes in the appearance of the metal surface, changes in its microstructure are examples of qualitative evaluation of the corrosion rate. For quantitative evaluation, you can use:

• time elapsed before the appearance of the first corrosion focus;
• the number of corrosion spots formed in a given time interval;
• reduction in the thickness of the material per unit time;
• change in the mass of the metal per unit surface per unit time;

Increase in corrosion resistance

Increase of corrosion resistance is possible by means of alloying, protective coating (chromium-plating, nickel-plating, painting of items), passivation, etc. The material should be subjected to tests. Material should meet the required mechanical properties - ultimate tensile strength, yield strength, elongation.

Supplier

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