Publicação: Corrosion behaviour of thermal sprayed nitinol coatings
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Pergamon-Elsevier B.V. Ltd
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Resumo
NiTi alloy is here investigated as an alternative coating to stainless steel since it is considered to possess good corrosion properties. Three different thermal spray techniques (high velocity oxy-fuel -HVOF-, vacuum plasma spray -VPS- and atmospheric plasma spray quenching -APS+Q-) have been used for building the coatings, and electrochemical tests have been carried out for corrosion evaluation. Open-circuit tests have revealed that the VPS-coating shows fairly good corrosion resistance, both in the as-sprayed and polished forms. The HVOF coatings however, showed a strong dependence on the surface conditions and APS+Q is dominated by electrolyte penetration through coating cracks, thus exhibiting a higher i(corr). (c) 2008 Elsevier Ltd. All rights reserved.
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Intermetallics, Potenciostatic, SEM, X-ray diffraction, Pitting corrosion
Idioma
Inglês
Como citar
Corrosion Science. Oxford: Pergamon-Elsevier B.V. Ltd, v. 51, n. 1, p. 171-180, 2009.
