Corrosion Incubation Period
The incubation time of corrosion is the time between the metal's contact with a corrosive medium and the first visible sign of cracking.
Physico-Chemical Mechanism of Action
The incubation time refers to the onset of chemical reactions that lead to corrosion. First, the metal forms a protective layer (e.g., oxide) that limits further attack. This process can take some time.
Metallurgical Relevance & Welding Risks
A long incubation time can lead to serious corrosion problems, especially in exposed steel structures. Cracks can slowly develop and eventually cause fracture. It is crucial to minimize the corrosive environment or protect the metal before exposure.
Workshop Practice & Instructions
To reduce incubation time, steel parts should be carefully cleaned and treated with anti-corrosion agents after welding. This can be achieved by applying paints or using galvanized plates. The environment should be dry and protected to prevent rapid corrosion.