热处理工艺对Ti6321合金腐蚀行为的影响

doi:10.11902/1005.4537.2022.023

中国腐蚀与防护学报

2023, Vol. 43

Issue (1): 152-158 CSTR: 32134.14.1005.4537.2022.023 DOI: 10.11902/1005.4537.2022.023

研究报告

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热处理工艺对Ti6321合金腐蚀行为的影响

张佳欢¹^,², 崔中雨¹(

), 范林², 孙明先²

^1.中国海洋大学材料科学与工程学院青岛 266100
^2.中国船舶重工集团公司第七二五研究所海洋腐蚀与防护国防科技重点实验室青岛 266237

Effect of Heat Treatment Process on Corrosion Resistance of Ti6321 Alloy

ZHANG Jiahuan¹^,², CUI Zhongyu¹(

), FAN Lin², SUN Mingxian²

^1.School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
^2.State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China

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摘要:

采用金相及扫描电镜对Ti6321合金在不同热处理工艺条件下的微观组织进行分析；采用电化学测试研究了不同组织Ti6321合金在人工海水及5 mol/L盐酸溶液中的耐蚀性能；采用扫描电镜以及激光共聚焦显微镜分析不同组织的Ti6321试样在5 mol/L盐酸溶液中浸泡后的腐蚀特征。结果表明，在人工海水溶液中，3种组织的Ti6321合金均具有优异的钝化能力，耐蚀性相差不大；在5 mol/L盐酸溶液中，魏氏组织耐腐蚀性能最差，等轴组织次之，双态组织的耐腐蚀性能最佳。

关键词 ： Ti6321合金, 显微组织, 人工海水溶液, 盐酸溶液, 腐蚀行为

Abstract：

The effect of heat treatments on the microstructure and corrosion behavior of Ti6321 Ti-alloy in artificial seawater and 5 mol/L hydrochloric acid solution was investigated by means of XRD, electrochemical tests, SEM and confocal laser scanning microscope. Results show that the three groups of Ti6321 Ti-alloy, which has been subjected to three different heat treatments, exhibit excellent passivation ability in artificial seawater with more or less the same level of corrosion resistance. In 5 mol/L HCl solution, the corrosion resistance of the Ti6321 Ti-alloy with widmanstatten structure is the worst, followed by equiaxed ones, while the alloy with double structure presents the best corrosion resistance.

Key words： Ti6321 alloy microstructure artificial seawater solution hydrochloric acid corrosion resistance

收稿日期: 2022-01-19 32134.14.1005.4537.2022.023

ZTFLH:

TG172

基金资助:国家自然科学基金(51931008)

作者简介: 张佳欢，女，1995年生，硕士生

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引用本文:

张佳欢, 崔中雨, 范林, 孙明先. 热处理工艺对Ti6321合金腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2023, 43(1): 152-158.
Jiahuan ZHANG, Zhongyu CUI, Lin FAN, Mingxian SUN. Effect of Heat Treatment Process on Corrosion Resistance of Ti6321 Alloy. Journal of Chinese Society for Corrosion and protection, 2023, 43(1): 152-158.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.023 或 https://www.jcscp.org/CN/Y2023/V43/I1/152

图1 3种不同条件热处理后的 Ti6321合金的金相组织

图2 经不同条件热处理后的Ti6321合金的微观组织SEM观察

图3 经3种不同条件热处理后的Ti6321合金的XRD衍射谱

图4 经3种不同条件热处理后的钛合金在人工海水及5 mol/L盐酸溶液中的开路电位

图5 3种钛合金试样在人工海水及5 mol/L盐酸溶液的极化曲线

表1 3种钛合金试样在人工海水中极化曲线的Tafel拟合结果

表2 3种钛合金试样在5 mol/L盐酸溶液中的极化曲线的Tafel拟合结果

图6 3种钛合金试样在人工海水及5 mol/L盐酸溶液中的电化学阻抗谱

表3 3种钛合金试样在人工海水中阻抗谱拟合结果

表4 3种钛合金试样在5 mol/L盐酸溶液中的阻抗拟合结果

图7 在5 mol/L盐酸溶液中浸泡10 d后Ti6321合金试样CLSM表面形貌

图8 在5 mol/L盐酸溶液中浸泡10 d后Ti6321合金试样的SEM形貌

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