TY - JOUR
T1 - Surface corrosion enhancement of passive films on NiTi shape memory alloy in different solutions
AU - Jinlong, Lv
AU - Tongxiang, Liang
AU - Chen, Wang
AU - Limin, Dong
N1 - Funding Information:
This work was financially supported by National Natural Science Foundation of China (Grant No. 91326203 ).
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - The corrosion behaviors of NiTi shape memory alloy in NaCl solution, H2SO4 solution and borate buffer solution were investigated. It was found that TiO2 in passive film improved the corrosion resistance of NiTi shape memory. However, low corrosion resistance of passive film was observed in low pH value acidic solution due to TiO2 dissolution. Moreover, the corrosion resistance of NiTi shape memory alloy decreased with the increasing of passivated potential in the three solutions. The donor density in passive film increased with the increasing of passivated potential. Different solutions affect the semiconductor characteristics of the passive film. The reducing in the corrosion resistance was attributed to the more donor concentrations in passive film and thinner thickness of the passive film.
AB - The corrosion behaviors of NiTi shape memory alloy in NaCl solution, H2SO4 solution and borate buffer solution were investigated. It was found that TiO2 in passive film improved the corrosion resistance of NiTi shape memory. However, low corrosion resistance of passive film was observed in low pH value acidic solution due to TiO2 dissolution. Moreover, the corrosion resistance of NiTi shape memory alloy decreased with the increasing of passivated potential in the three solutions. The donor density in passive film increased with the increasing of passivated potential. Different solutions affect the semiconductor characteristics of the passive film. The reducing in the corrosion resistance was attributed to the more donor concentrations in passive film and thinner thickness of the passive film.
KW - Corrosion resistance
KW - Electrochemical properties
KW - Passive film
KW - Surface
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U2 - 10.1016/j.msec.2016.02.066
DO - 10.1016/j.msec.2016.02.066
M3 - Article
C2 - 27040211
AN - SCOPUS:84959360312
VL - 63
SP - 192
EP - 197
JO - Materials Science and Engineering C
JF - Materials Science and Engineering C
SN - 0928-4931
ER -