摘要
添加合金元素可提高非晶合金的耐蚀性。对Ti-Zr-Be-Cu块体非晶合金添加Co,采用电化学极化曲线和浸泡腐蚀法研究所制备的Ti35Zr30Be27.5-xCu7.5Cox(x=3.5,7.5,11.5)块体非晶合金在不同温度1 mol/L HCl溶液中的腐蚀行为,探讨添加Co元素提高Ti-Zr-Be-Cu块体非晶合金耐蚀性的机理。结果表明:Ti35Zr30Be27.5-xCu7.5Cox块体非晶合金在298 K的1 mol/L HCl溶液中都具有很好的耐蚀性,阳极极化曲线表现出明显的钝化特征,随着Co元素含量的增大其耐蚀性能逐渐增强,非晶合金的自腐蚀电位高于不锈钢,自腐蚀电流密度比不锈钢小1个数量级;在313,333 K的1 mol/L HCl中浸泡腐蚀失重,随Co含量增大,非晶合金耐蚀性增强。
The corrosion behavior of Ti35Zr30Be27. 5- xCu7. 5Cox( x = 3. 5,7. 5,11. 5) bulk amorphous alloys in 1 mol / L HCl solution at different temperatures was evaluated by potentiodynamic polarization curve measurement and immersion corrosion test,and the effect of Co content on the corrosion behavior of the bulk amorphous alloy was investigated. It was found that Ti35Zr30Be27. 5- xCu7. 5Coxbulk amorphous alloys exhibited good corrosion resistance in 1 mol / L HCl solution at 298 K. The cathode polarization curves of the bulk amorphous alloys showed obvious signs of passivation,and their corrosion resistance tended to gradually increase with the increase of Co content. In the meantime,the corrosion potential of the Ti-Zr-Be-Cu-Co bulk amorphous alloys was higher than that of stainless steel,and their corrosion current density was lower than that of stainless steel by one order of magnitude. Immersion corrosion test in 1 mol / L HCl solution of 313,333 K showed thatthe corrosion resistance of the bulk amorphous alloys tended to increase with the increase of Co content.
出处
《材料保护》
CAS
CSCD
北大核心
2015年第5期46-48,8-9,共3页
Materials Protection
基金
吉林化工学院项目(2014005)
吉林工业职业技术学院项目资助
