两种NiAl基合金在酸腐蚀工况下的磨损特性

doi:10.11901/1005.3093.2014.659

材料研究学报

2015, Vol. 29

Issue (8): 595-601 DOI: 10.11901/1005.3093.2014.659

本期目录 | 过刊浏览

两种NiAl基合金在酸腐蚀工况下的磨损特性

王振生^1,²(

),杨双双¹,彭真¹,谭清奇¹,郭建亭³,周兰章³

1. 湖南科技大学先进矿山装备教育部工程研究中心湘潭 411201
2. 湖南科技大学高温耐磨材料及制备技术湖南省国防科技重点实验室湘潭 411201
3. 中国科学院金属研究所沈阳 110016

Corrosive-Wear Properties of Two NiAl Alloys in Sulfuric Acid Solution

Zhensheng WANG^1,^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

引用本文:

王振生,杨双双,彭真,谭清奇,郭建亭,周兰章. 两种NiAl基合金在酸腐蚀工况下的磨损特性[J]. 材料研究学报, 2015, 29(8): 595-601.
Zhensheng WANG, Shuangshuang YANG, Zhen PENG, Qingqi TAN, Jianting GUO, Lanzhang ZHOU. Corrosive-Wear Properties of Two NiAl Alloys in Sulfuric Acid Solution[J]. Chinese Journal of Materials Research, 2015, 29(8): 595-601.

全文: PDF(5514 KB) HTML

摘要:

研究了NiAl-2.5Ta-7.5Cr-x(0, 1)B合金在5% H₂SO₄溶液中的腐蚀磨损特性, 结果表明: 在酸腐蚀工况下NiAl-2.5Ta-7.5Cr-1B合金的耐蚀性能优于NiAl-2.5Ta-7.5Cr合金, 易钝化成膜, 静置腐蚀速率为0.007 mg/(cm²h¹), 钝化电流密度为0.299(mAcm^-2), 自然腐蚀电位为-0.213 V, 表现出良好的耐酸腐蚀性能及稳定性。物质膜完整地覆盖在NiAl-2.5Ta-7.5Cr-1B合金的磨损表面, 抑制了腐蚀对磨损的加速作用, NiAl-2.5Ta-7.5Cr-1B合金比NiAl-2.5Ta-7.5Cr合金的腐蚀磨损率减小了2-8倍。NiAl-7.5Cr-2.5Ta-1B合金的磨蚀, 受控于腐蚀磨损和完整的物质膜的保护作用。NiAl-2.5Ta-7.5Cr合金的磨蚀机制, 受控于腐蚀磨损和磨粒磨损。

关键词 ：金属材料, NiAl-2.5Ta-7.5Cr合金, NiAl-2.5Ta-7.5Cr-1B合金, H₂SO₄, 腐蚀磨损, 磨损机制

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.

Key words： metallic materials NiAl-2.5Ta-7.5Cr alloy NiAl-2.5Ta-7.5Cr-1B alloy H₂SO₄ corrosive wear abrasion mechanism

收稿日期: 2014-11-10

基金资助:* 湖南省自然科学基金13JJ8015和国家自然科学基金51101055资助项目。

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图1 合金的背散射组织形貌

图2 两种合金腐蚀前后的XRD图谱

图3 两种合金在酸溶液中的电化学极化曲线

图4 两种合金在酸溶液中的腐蚀磨损性能

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