Tribocorrosion
Tribocorrosion is wear caused by friction and chemical corrosion together. Mechanical stress and chemical environmental conditions lead to rapid material removal.
Physical-Chemical Mechanism of Action
Tribocorrosion occurs when mechanical friction combines with chemical corrosion processes. During friction, hot spots and electrical potentials develop that influence the chemical environment. This leads to accelerated oxidation or alteration of the material.
Metallurgical Relevance & Welding Risks
Tribocorrosion can occur in weld zones and leads to rapid surface loss. This increases susceptibility to cracking and reduces component life. In heavily loaded environments, this can lead to premature failure and safety issues.
Shop Practice & Action Guidelines
To avoid tribocorrosion, it is important to protect the weld as much as possible. Use proper shielding and ensure a clean surface before welding. In high-load or chemically aggressive environments, additional corrosion protection may be needed.