Korrosioonitöötluse

Korrosioonitöötlus refers to various processes and techniques used to prevent or slow down the degradation of materials, primarily metals, due to corrosion. Corrosion is a natural electrochemical process where a metal reacts with its environment, typically leading to its deterioration. Korrosioonitöötlus aims to counteract this by altering the material's surface properties or by isolating it from corrosive agents.

Common methods of korrosioonitöötlus include coating, where a protective layer is applied to the metal surface. This can be achieved through painting, galvanizing (applying a zinc coating), electroplating (depositing a thin layer of another metal), or anodizing (an electrochemical process that thickens the natural oxide layer). Another approach is passivation, which involves treating a metal surface to make it less reactive. For stainless steels, this often involves removing free iron from the surface.

Sacrificial protection is another strategy, where a more reactive metal is attached to the metal being protected. This sacrificial metal corrodes instead of the primary material. Cathodic protection, both impressed current and galvanic, is a form of this. Inhibitors can also be added to the environment or applied to the surface to reduce the rate of corrosion reactions. Surface treatments like phosphating can improve paint adhesion and provide some corrosion resistance. The choice of korrosioonitöötlus depends on the material, the intended application, and the expected environmental conditions.