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Corrosive-Wear Properties of Two NiAl Alloys in Sulfuric Acid Solution |
Zhensheng WANG1,2,**( ),Shuangshuang YANG1,Zhen PENG1,Qingqi TAN1,Jianting GUO3,Lanzhang ZHOU3 |
1. Engineering Research Center of Advanced Mining Equipment, Ministry of Education , Hunan University of Science and Technology, Xiangtan 411201, China 2. Hunan Provincial Key Laboratory of National Defense Science and Technology for High Temperature Wear Resistance Materials and Preparation Technology, Hunan University of Science and Technology,Xiangtan 411201, China 3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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Cite this article:
Zhensheng WANG,Shuangshuang YANG,Zhen PENG,Qingqi TAN,Jianting GUO,Lanzhang ZHOU. Corrosive-Wear Properties of Two NiAl Alloys in Sulfuric Acid Solution. Chinese Journal of Materials Research, 2015, 29(8): 595-601.
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Abstract The corrosion wear properties of NiAl-2.5Ta-7.5Cr-x(0, 1)B alloys in 5% H2SO4 solution have been investigated at room temperature. The results show that in comparison with NiAl-2.5Ta-7.5Cr alloy, NiAl-2.5Ta-7.5Cr-1B alloy exhibited better corrosion resistance to 5% H2SO4 solution with passive current density 0.299(μAcm-2)and free corrosion potential -0.213 V. For which the key factor is that a passive film could form on the surface of NiAl-2.5Ta-7.5Cr-1B alloy. The corrosion wear rate of NiAl-2.5Ta-7.5Cr-1B alloy decreased 2-8 times compared with NiAl-2.5Ta-7.5Cr alloy. The abrasion erosion mechanism for NiAl-7.5Cr-2.5Ta-1B alloy was dominated by the synergistic effect of corrosion wear and protectiveness of passive film. While that for NiAl-7.5Cr-2.5Ta alloy was mainly corrosion wear and abrasive wear.
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Received: 10 November 2014
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Fund: *Supported by Natural Science Foundation of Hunan Province No.13JJ8015, National Natural Science Foundation of China No. 51101055. |
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