Erosion corrosion
Erosion corrosion is the damage to materials caused by chemical corrosion and mechanical abrasion from a flowing medium. The medium destroys the protective layer, increasing the attack rate.
Physicochemical mechanism of action
Erosion corrosion results from the combination of chemical corrosion and mechanical abrasion. A flowing medium (such as water or air) continuously destroys the protective layer of the material. This increases the rate of chemical reactions because the material is directly exposed to corrosive agents.
Metallurgical relevance & welding risks
Erosion corrosion can lead to rapid destruction of weld areas, especially in environments with high water pressure or chemical media. This can cause cracks, deformation, and reduced material life.
Shop practice & instructions
To avoid erosion corrosion, it is important to protect weld areas before use. This can be achieved by applying corrosion-resistant coatings or using materials with higher corrosion resistance. In heavily stressed environments, regular inspection and maintenance are essential.