Page 26 - 理化检验-物理分册2025年第三期

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试验与研究 DOI:10.11973/lhjy-wl230165

含氢 Ti70 合金的耐腐蚀性能试验

王 佳 ，高宇昊 ，罗先甫 ，孙绪鲁 ，刘晓勇 ，张欣耀 1,2
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（1.中国船舶集团有限公司第七二五研究所，洛阳 471023；2.河南省船舶及海工装备结构材料技术与
应用重点实验室，洛阳 471023）
摘 要：研究了氢含量对Ti70合金静态全浸腐蚀性能、动态浸泡腐蚀性能、盐雾腐蚀性能、电化
学性能、应力腐蚀性能的影响。结果表明：将氢含量不同的3组试样在人工海水中浸泡672 h后，3组
试样的腐蚀速率均接近于0；氢含量不同的3组试样经720 h盐雾试验后，腐蚀速率均接近于0；氢含
量不同的3组试样经动态浸泡试验504 h后，腐蚀速率均接近于0；对充氢与未充氢试样进行电化学
测试，发现其极化曲线差别较大；充氢后试样的应力腐蚀性能发生明显变化。在试验所用氢含量范
围内，Ti70合金氢含量的升高未对其耐腐蚀性产生明显影响，原因为钛合金的耐腐蚀性来源于表面
致密氧化膜，而在静态浸泡环境中，氢原子的吸入不会影响表面钝化膜的形成与自修复，但材料的
耐应力腐蚀能力较差，在力的作用下，钛合金中氢的存在会阻碍表面钝化膜的自修复。
关键词： Ti70合金；氢；极化曲线；应力腐蚀；耐腐蚀性
中图分类号：TG146.2+3；TB31 文献标志码：A 文章编号：1001-4012(2025)03-0014-06
Corrosion resistance test of Ti70 alloy containing hydrogen

WANG Jia , GAO Yuhao , LUO Xianfu , SUN Xulu , LIU Xiaoyong , ZHANG Xinyao 1,2
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(1. Luoyang Ship Material Research Institute, Luoyang 471023, China; 2. Henan Key Laboratory of Technology and
Application of Structural Materials for Ships and Marine Equipments, Luoyang 471023, China)
Abstract: The effects of hydrogen content on the static full immersion corrosion property, dynamic immersion
corrosion property, salt-spray fog corrosion property, electrochemical property and stress corrosion property of Ti70
alloy were studied. The results show that the corrosion rates of the three groups of samples with different hydrogen
contents were close to 0 after soaking in artificial seawater for 672 h. The corrosion rates of the three groups of samples
with different hydrogen contents were close to 0 after 720 h salt spray test. The corrosion rates of the three groups of
samples with different hydrogen contents were close to 0 after 504 h of dynamic immersion test. Electrochemical tests
were carried out on hydrogen-charged and uncharged samples, and it was found that the polarization curves were quite
different. After hydrogen charging, the stress corrosion properties of the samples changed significantly. In the range of
hydrogen content used in the experiment, the increase of hydrogen content in Ti70 alloy had no significant effect on its
corrosion resistance. The reason was that the corrosion resistance of titanium alloy came from the surface dense oxide
film. In the static immersion environment, the inhalation of hydrogen atoms would not affect the formation and self-
healing of the surface passivation film, but the stress corrosion resistance of the material was poor. Under the action of
force, the presence of hydrogen in titanium alloy would hinder the self-healing of surface passivation film.
Keywords: Ti70 alloy; hydrogen; polarization curve; stress corrosion; corrosion resistance

钛合金具有多种多样的优良性能，如熔点高、密 和优异的耐腐蚀性，使其在金属领域占有重要的地
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度小、无毒性等 [1-7] ，但最突出的两个特性是高比强度 位，钛合金的发展速度比任何结构材料都要快 。钛
合金优异的耐腐蚀性主要来自于其表面可快速形成
收稿日期：2023-06-15 迅速修复的致密氧化膜，而钛元素本身具有极高的化
作者简介：王 佳（1995-） ，女，硕士，工程师，主要从事氢脆和 学活性，与氢、氧等元素均具有极强的亲和力。在生
应力腐蚀研究工作
产制造过程中，如熔炼、铸造、酸洗、焊接等环节和服
通信作者：刘晓勇，liuxiaoyongsjtu@163.com
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