Macro-galvanic corrosion of tower grounding device consisting of graphite and Zn-coated steel in a simulated soil environment

Liu, Ling; Li, Jingjing; Peng, Mingxiao; Li, Wenbo; Lei, Bing; Meng, Guozhe

doi:10.1016/j.engfailanal.2022.106136

Cited by 7 publications

(1 citation statement)

References 25 publications

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“…Recent research by Song et al (2021) has extended to the galvanic corrosion between certain metals and carbon-fibre-reinforced polymers. Lui et al (2022) also published on the interaction between graphite grounding electrodes and zinc-plated steel grounding straps. Few studies have currently been conducted for soil or rock environments, leaving a gap for the mining industry.…”

Section: Introductionmentioning

confidence: 99%

Accelerated galvanic corrosion between graphitic rock from underground mines and metal coupons

Stazick,

Feagan,

Sunderman

2023

Ground Support 2023: Proceedings of the 10th International Conference on Ground Support in Mining

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Dissimilar materials, such as steel and graphite, can experience galvanic corrosion resulting in safety hazards for many industries. Rock samples from a United States mine that exhibits electrochemical properties similar to graphite were galvanically coupled to corrosion coupons in an accelerated environment. Traditional weight loss and potentiostatic measurements were utilised to investigate the rock's observed in situ influence on metal comparable to underground support (e.g. rockbolts or steel mesh). Corrosion rates of the galvanically coupled coupons were multiple times higher than the coupons in the standard solution alone, with coupons held at higher temperature and humidity experiencing the most aggressive degradation over the testing period. Surface analysis of samples revealed extensive pitting of the steel, resembling failed bolt samples from partner mines. Metallic ground support in contact with graphitic rock has a higher potential for severe corrosion rates that could lead to premature failure of the ground support and ultimately pose a safety threat to mine workers without intervention.

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Section: Introductionmentioning

confidence: 99%