摘要
采用超高真空气相氢渗透技术在８０～２５０℃温度范围内，测定了氢在化学镀非晶态Ｎｉ－Ｐ／Ｆｅ双层结构材料中的扩散系数，研究了化学镀Ｎｉ－Ｐ镀层及其在３００℃下真空退火热处理１ｈ后对氢在基材中扩散行为的影响。结果表明，在实验温度范围内，氢在化学镀Ｎｉ－Ｐ／Ｆｅ双层结构中的有效扩散系数Ｄ与温度Ｔ的关系遵循Ａｒｒｈｅｎｉｕｓ方程，３００℃真空退火处理后，有效扩散系数基本不变。
The effective hydrogen diffusivity in a bilayer of electroless amorphous Ni P/Fe is determined using an ultrahigh vacuum technique over the temperature range of 80～250℃.The effects of electroless Ni P coating and annealing on hydrogen diffusion behaviour in Fe in a vacuum at 300℃ for 1 h are studied.The results indicate that the effective diffusivity of hydrogen in the bilayer obeys Arrhenius relationship over the experimental temperature range. Electroless Ni P coating has no strong barrier effect on hydrogen diffusion, the effective diffusivity is only reduced by a factor of two or so, and after annealing at 300℃ the effective diffusivity is basically the same.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1996年第4期301-304,共4页
Corrosion Science and Protection Technology
基金
国家自然科学基金
