Cu-20Co-20Cr-20Ni合金在0.5 mol·L^(-1)中性Na Cl溶液中腐蚀行为研究  

Corrosion Behavior of Cu-20Co-20Cr-20Ni Alloy in 0.5 mol·L^(-1) NaCl Neutral Solutions

作　　者：张昊鑫 王晴 曹中秋 张轲 王艳 ZHANG Haoxin;WANG Qing;CAO Zhongqiu;ZHANG Ke;WANG Yan(College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang Liaoning 110034,China)

机构地区：[1]沈阳师范大学化学化工学院,辽宁沈阳110034

出　　处：《辽宁化工》2024年第5期678-681,共4页Liaoning Chemical Industry

基　　金：辽宁省重点研发计划项目(项目编号:2018304025)。

摘　　要：纳米材料因其自身独特性能而备受关注,从而引发了人们对其进行一系列的研究。采用机械合金化法(MA)和粉末冶金法(PM)制备了纳米尺寸和常规尺寸粉末,通过控制温度和压力等因素,利用真空热压烧结炉将两种不同尺寸的Cu-20Co-20Cr-20Ni粉末热压成块体合金,并利用电化学测试技术研究了它们在0.5mol·L^(-1)中性Na Cl溶液中的腐蚀行为以及纳米化对其腐蚀行为的影响。结果表明:当Cu-20Co-20Cr-20Ni合金处于0.5mol·L^(-1) Na Cl腐蚀溶液中时,纳米尺寸Cu-20Co-20Cr-20Ni合金较相应的常规尺寸合金自腐蚀电位发生正移,电荷传递电阻变大,腐蚀电流密度减小。可见,晶粒细化导致Cu-20Co-20Cr-20Ni合金的耐腐蚀性能增强。Nanomaterials have gained significant attention due to their unique properties,leading to extensive research in this field.Nano-sized and conventionally sized powders were prepared through mechanical alloying(MA)and powder metallurgy(PM)techniques in experiments.By controlling factors such as temperature and pressure,both sizes of Cu-20Co-20Cr-20Ni powders were consolidated into bulk alloys using a vacuum hot-press sintering furnace.The corrosion behavior of these alloys and the impact of nanocrystallization were studied using electrochemical tests in 0.5 mol·L^(-1) neutral NaCl solution.The results indicated that when Cu-20Co-20Cr-20Ni alloy was exposed to a 0.5 mol·L^(-1) NaCl corrosive solution,the nanosized Cu-20Co-20Cr-20Ni alloy exhibited a positive shift in its self-corrosion potential compared to the corresponding conventional-sized alloy.Furthermore,the charge transfer resistance increased,and the corrosion current density decreased for the nanosized alloy.Therefore,it can be concluded that grain refinement can enhance the corrosion resistance properties of Cu-20Co-20Cr-20Ni alloy.

关 键 词：纳米晶 腐蚀电化学 机械合金化法 Cu-Co-Cr-Ni合金 

分 类 号：TG113.23[金属学及工艺—物理冶金]