Uniform corrosion
Area corrosion is a uniform material removal over the entire exposed metal surface by corrosive attack. It is easily calculable in measurement and rarely leads to sudden component failure.
Physicochemical Mechanism of Action
General corrosion results from a chemical reaction between the metal and a corrosive environment, such as air or water. A typical example is rusting of steel, where iron reacts with oxygen and water to form iron oxide.
Metallurgical Relevance & Welding Risks
General corrosion can lead to long-term material wear, reducing the service life of components. It can also lead to mechanical cracks and deformation when the metal expands or swells. In the welding shop, general corrosion can occur due to poor surface preparation or lack of protective measures.
Shop Practice & Instructions
To prevent general corrosion, metals should be thoroughly cleaned and protected before welding. Use anti-corrosion agents such as paints or sprays as needed. Ensure proper protective layer formation by choosing the right welding process and suitable filler materials. If existing general corrosion is present, thoroughly clean the metal and treat it with anti-corrosion agents.