表面层对材料氢渗透的影响  

EFFECTS OF SURFACE COATINGS ON HYDROGEN PERMEATION IN IRON

作　　者：王雪芬[1,2] 吴秋允[1,2] 孙秀魁 魏宝明[1,2] 

机构地区：[1]南京化工大学应用化学系 [2]中国科学院金属研究所快速凝固非平衡合金国家重点实验室

出　　处：《腐蚀科学与防护技术》1997年第1期83-86,共4页Corrosion Science and Protection Technology

基　　金：国家自然科学基金

摘　　要：采用超高真空气相渗透技术，在８０～２５０℃温度范围内，研究了Ｈ在两种不同方式的镀Ｎｉ的纯铁中的有效扩散系数和渗透率，同时也研究了表面电镀光亮Ｐｄ的纯铁中的氢扩散系数．结果表明，在实验温度范围内，Ｈ在两种镀Ｎｉ处理的纯铁中的有效扩散系数Ｄ和渗透率Φ与温度Ｔ的关系均遵循Ａｒｒｈｅｎｉｕｓ方程，且二者Ｄ值相近，电镀纳米Ｎｉ的纯铁样品渗透率Φ值略高于化学镀Ｎｉ－Ｐ。The effective hydrogen permeabilities and diffusivities in iron coated with amorphous Ni P and nanocrystalline nickel are measured using ultrahigh vacuum gaseous permeation technique within the temperature range of 80～250℃. The hydrogen diffusivity in iron coated with bright palladium is investigated as well.The experiment results showed that the effective hydrogen diffusivity of iron coated with bright Pd is 1 to 2 times lower in magnitude than those of surface electroless amorphous Ni P and electrodeposited nanocrystalline nickel,and two kinds of nickel coatings exhibit higher catalytic effect than that of bright Pd. The effective hydrogen diffusivities and permeabilities in iron coated with two different kinds of nickel obey the Arrhenius relationship over the experimental temperature range,their diffusivity values are approximately the same,and the effective permeability of nanocrystalline nickel coated sample is slightly higher than that of electroless Ni P coated one.

关 键 词：气相氢渗透 化学镀 氢渗透 腐蚀 

分 类 号：TG172.83[金属学及工艺—金属表面处理]