Effects of Hydrostatic Pressure and Cathodic Polarization on Stress Corrosion of Titanium Alloy in Seawater
-
摘要: 采用电化学极化实验、慢应变速率拉伸实验、断口形貌观察和恒变形应力腐蚀裂纹扩展实验的方法,研究静水压力和阴极极化对Ti75合金海水应力腐蚀的影响。结果表明:静水压力对Ti75合金的应力腐蚀敏感性没有明显影响。在阴极极化情况下,Ti75合金的应力腐蚀临界应力强度因子(KISCC)下降,其应力腐蚀敏感性随着电位的负移而提高,-0.77 V为氢致应力腐蚀发生的临界电位。Abstract: The effects of hydrostatic pressure and cathodic polarization on stress corrosion of Ti75 alloy are studied by electrochemical polarization test, slow rate test(SSRT), fracture morphology observation and constant deformation stress corrosion test.Resultsshow that hydrostatic pressure has no obvious effect on stress corrosion sensitivity of Ti75 alloy. Under the circumstance of cathodic polarization, the critical stress intensity factor of stress corrosion(KISCC) of Ti75 alloy decreases, and the stress corrosion sensitivity increases with the negative shift of the potential. The critical cathodic polarization potential of hydrogen induced stress corrosion is-0.77 V.
-
Keywords:
- Ti75 /
- stress corrosion /
- hydrostatic pressure /
- cathodic polarization
-
-
[1] 孟祥军,陈春和,余巍,等.几种海洋工程用钛合金及其应用[J].中国造船,2004,45(1):38-43. [2] 李德强,王树森,包恩达.钛合金材料在船舶材料上的应用与发展[J].世界有色金属,2015(9):127-128. [3] 吕利强,席锦会,王伟,等.我国海洋工程用钛合金发展现状及展望[J].冶金工程,2015(2):89-92. [4] 陈军,赵永庆,常辉.中国船用钛合金的研究和发展[J].材料导报,2005,19(6):67-70. [5] 赵永庆.我国创新研制的主要船用钛合金及其应用[J].中国材料进展,2014,33(7):398-404. [6] 富招弟,李佐臣,黄张洪.两种典型船用钛合金的应用[J].热加工工艺,2012,41(14):105-107. [7] 郭为民,李文军,陈光章.材料深海环境腐蚀试验[J].装备环境工程,2006,3(1):10-15. [8] 许立坤,等著.海洋工程的材料失效与防护[M].北京:化学工业出版社,2014. [9] 蒋鹏,王启,张斌斌,等.深海装备耐压结构用钛合金材料应用研究[J].中国工程科学,2019,21(6):95-101. [10] 张睿,张慧霞,贾瑞灵,等.钛及其合金的腐蚀[J].材料开发与应用,2013,28(4):96-103. [11] 王海杰,王佳,彭欣,等.钛合金在3.5%NaCl溶液中的腐蚀行为[J].中国腐蚀与防护学报,2015,35(1):75-80. [12] KOLMAN D G,SCULLY J R.Understanding the potential and pH dependency of high-strength β-titanium alloy environmental crack initiation[J].Metallurgical and Materials Transactions A,1997,28(12):2645-2656.
计量
- 文章访问数: 117
- HTML全文浏览量: 17
- PDF下载量: 22