Part I. Thermodynamic and Kinetic Aspects of the Hot Dip (Zn) - Coating Formation

Archives of Metallurgy and Materials

T. Okane²  B. Kucharska³  G. Garzeł⁴  W. Wołczyński⁴  A. Sypień⁴  Z. Pogoda⁵ 

[1] TECHNOLOGY, 305 8568 TSUKUBA, UMEZONO 1-1-1, JAPAN;AIST – NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE &CZ?STOCHOWA UNIVERSITY OF TECHNOLOGY, FACULTY OF PRODUCTION ENGINEERING AND MATERIALS TECHNOLOGY, 19 ARMII KRAJOWEJ STR., 42-200 CZ?STOCHOWA, POLAND;INSTITUTE OF METALLURGY AND MATERIALS SCIENCE, POLISH ACADEMY OF SCIENCES, 25 REYMONTA STR., 30-059 KRAKÓW, POLAND;JAGIELLONIAN UNIVERSITY, FACULTY OF MATHEMATICS AND COMPUTER SCIENCE, 6 ?OJASIEWICZA STR., 30-348 KRAKÓW, POLAND

关键词: Keywords: (Zn) - coatings;    meta-stable solidification;    phase diagrams;    mass balance;    growth kinetics;    peritectic reaction;   

DOI  :  10.2478/amm-2014-0212

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

A hot dip (Zn) – coating formation is carried out in the industry conditions. Two types of the steel substrate are applied to the experiment. Two morphologically different coatings are obtained, accordingly. A hot dip (Zn) – coating formation is also carried out in the laboratory conditions for making some additional explanations of the revealed phenomena. The thickening of the - phase sub-layer is observed in details to determine time of the transition from stable into meta-stable solidification. The Fe-Zn phase diagrams for stable and meta-stable equilibrium are calculated, respectively. The phase diagram for dissolution is also determined. The criterion of the higher temperature of the solid/liquid (s/l) interface is successfully applied to the Fe-Zn system to justify the competition between stable and meta-stable solidification. The mass balance verification is performed for the (Zn) - coating in order to define the nominal Zn–solute concentration required by dissolution and next by solidification. The Zn – solute concentration in the dissolution, super-saturation and saturation zones are determined thermodynamically. The growth kinetics is described for all the sub-layers in the (Zn) – coating.

【 授权许可】

Unknown