摘要
综述了热镀锌层组织形貌特点及生长动力学 ,以及钢中元素 (C、Si、P、S、Mn、V、Nb、Ti、Al、Cr、Ni等 )对Fe -Zn反应的影响。研究表明 :热镀锌时 ,ζ相在Fe/Zn界面优先形核生长 ,δ相是紧随着 ζ相在由Fe/ ζ相界面上形成 ,而Γ相要经过一定时间的孕育期才形成 .Fe -Zn合金相层的生长动力学符合经验公式d =Ctn.钢中元素C、Si或P均促进Fe -Zn反应 ,尤其以Si的影响最显著 ,S则无影响 .钢中一定含量的合金元素Mn、Cr或Ni会促进镀层生长 ,而Ti、V或Nb对钢结构件热镀锌基本无影响 .
This paper reviews the microstructure,morphology and growth kinetics of galvanized coatings,and a critical appraisal of the effect of elements in steel (C,Si,P,S,Mn,V,Nb,Ti,Al,Cr,Ni,etc) on the interaction between iron and molten zinc is also included.It shows that during hot dip galvanizing,the nucleation and growth of the Fe-Zn phases occurs at the interface beginning with ζ phase layer,then followed by δ phase layer,and Γ phase layer formed after some incubation time.The kinetics of Fe-Zn alloy layer growth follows conventional empirical equation: d=Ct n.Certain elements such as C,Si,or P in steel will promote the Fe-Zn reaction,especially Si,but S has no effect on the reaction.The alloying elements like Mn,Cr or Ni in steel will accelerate the Fe-Zn phase layers growth,while Ti,V,or Nb in steel has no effect on it.So the technology of hot dip galvanizing should be adjusted with the different composition of steel.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2004年第3期162-165,共4页
Corrosion Science and Protection Technology
