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操纵高耐腐蚀合金对抗腐蚀的阴极修改效应

Bosung Seo¹, Hyung-Ki Park¹, Chang-Soo Park¹

¹Gangwon Regional Division, Korea Institute of Industrial Technology, Gangneung-si 25440, Gangwon-do, Republic of Korea.

Materials (Basel, Switzerland)

|September 28, 2023

概括

提高ASTM 13级合金的耐腐蚀性需要控制Ti2Ni沉物. 优化冷却和老化精制沉物,增强阴极修饰和被动化,以获得卓越的性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
金工业是一种金工业.

背景情况:

ASTM 13级 (Gr13) 合金的耐腐蚀性对于各种应用至关重要.
受到Ti2Ni沉物影响的阴极修饰在合金被动化中起着关键作用.
控制沉物大小和分布对于提高合金性能至关重要.

研究的目的:

为了提高Gr13合金的耐腐蚀性.
为了研究Ti2Ni沉和 (Ru) 在阴极修饰中的作用.
优化热处理参数,以控制沉物形态和增强被动化.

主要方法:

控制的再结晶和热处理 (化,水化,老化) 的Gr13合金.
微结构分析观察Ti2Ni沉物大小,分布和相位形成.
电化学测试,包括开放电路潜力 (OCP) 测量,以评估耐腐蚀性和被动性.
评估合金对进化反应 (HER) 的催化活性.

主要成果:

优化的冷却速率 (160.9°C/分钟) 和在600°C的老化导致了沿谷物边界的提炼和分离的Ti2Ni沉物.
水的火导致了缺少沉物和显著的β-Ti相.
经过水火后的老化样本表现出HER的最低发病潜力和最高腐蚀潜力.
OCP结果证实,由于加强的阴极修饰,老年样本的被动化存活率有所改善.
老化样本中的精制和分离的沉物与最低的腐蚀率相关.

结论:

通过控制的Ti2Ni沉来操纵正极变化,可以显著提高Gr13合金的耐腐蚀性.
热处理参数,特别是冷却速度和老化温度,对于控制沉物特性和改善被动化至关重要.
精炼和分离的Ti2Ni沉物作为HER的有效催化剂,增强了合金的被动化能力.

关键词:

腐蚀腐蚀是一种腐蚀.耐腐蚀的合金是耐腐蚀的沉沉沉沉的坦和坦是不同的.氧化 (tantalum oxide) 是一种氧化物.

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