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Investigations on the oxidation of Zn-coated steel cables
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Orientador(es)
Resumo(s)
The automotive component industry has been constantly being studying
to improve its performance. Bowden cables are present in opening doors,
moving windows and others. In braided cables formed by galvanized
wires with Zn steel exposed to the usual environmental conditions, the
generation of ZnO appears, a phenomenon known as "white corrosion".
The investigation consisted of mitigating the causes of the ZnO
formation. Scanning electron microscopy (SEM) and Electron Probe
Micro-Analyzer (EPMA) technology, allowed to detect that the
generation of ZnO was induced by the presence of nucleating elements of
ZnO on the surface of the steel cable before galvanizing with Zn. The S,
Cl and O became visible in the interface between coating and substrate.
This allowed concluding, under the coating, there were harmful products
capable of triggering the ZnO nucleation reaction. So, the storage and
cleaning of the steel wire before galvanizing is essential to prevent the
ZnO formation.
Descrição
Palavras-chave
Zn-coated steel cables Automotive White corrosion Zinc oxide
Contexto Educativo
Citação
Editora
Faculty of Mechanical Engineering, Belgrade