Corrosion behaviour of thermal sprayed nitinol coatings

被引：60
|
作者：
Guilemany, J. M. [1 ]
Cinca, N. [1 ]
Dosta, S. [1 ]
Benedetti, A. V. [2 ]
机构：
[1] Univ Barcelona, Dept Mat Sci & Engn, Thermal Spray Ctr, Barcelona, Spain
[2] UNESP Univ Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
来源：
CORROSION SCIENCE | 2009年 / 51卷 / 01期
关键词：
Intermetallics; Potenciostatic; SEM; X-ray diffraction; Pitting corrosion; CAVITATION EROSION RESISTANCE; THIN-FILMS; SHAPE; SURFACE; STEEL; HVOF;
D O I：
10.1016/j.corsci.2008.10.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：171 / 180
页数：10
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