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• EC • Season Cracking • Intergranular • SSC • LME • MIC • SCC • HB-HE-HIC • Fatigue • Erosion • Fretting • Stray Current • Index |
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Different Types of
Corrosion
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Stray Current Corrosion |
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Recognition |
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What is stray current corrosion? Stray current corrosion or stray current electrolysis refers to corrosion resulting from stray current -current flowing through paths other than the intended circuit.
The process of stray current corrosion is electrolysis in nature. The extent of damage or loss of metal is directly proportional to the magnitude of stray current passing through the system. Underground pipelines and storage tanks without CP systems are particularly susceptible to stray current corrosion. Stray current corrosion tends to be localized, causing a concentration of pits that is not normally observed at locations where the stray current leaves metal structure.
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Mechanisms |
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What causes Stray current corrosion? Stray current corrosion is different from natural corrosion because it is caused by an externally induced electrical current and is basically independent of such environmental factors as oxygen concentration or pH. Environmental factors may enhance other corrosion mechanisms involved in the total corrosion process, but the stray current corrosion portion of the mechanism is unaffected.
Stray current may originate from the following sources:
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Prevention |
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How to prevent stray current corrosion? Stray current corrosion can be prevented through:
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For more details |
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More details on stray current corrosion are included in the following corrosion courses which you can take as in-house training courses, course-on-demand, online courses or distance learning courses:
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