Structure and Corrosion Resistance of Zinc Alloy Coated Steel Sheets Obtained by Continuous Vapor Deposition Apparatus
Structure and Corrosion Resistance of Zinc Alloy Coated Steel Sheets Obtained by Continuous Vapor Deposition Apparatus
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连续气相沉积装置获得的锌合金钢板的组织和耐腐蚀性能
DOI：
10.2355/tetsutohagane1955.77.7_995
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发表时间：
1991
影响因子：
0.3
通讯作者：
H. Satoh
中科院分区：
文献类型：
--
作者：
Junji Kawafuku;J. Katoh;Toyama Masao;Nishimoto Hidetoshi;K. Ikeda;H. Satoh
摘要：利用连续气相沉积装置研制了新型锌合金涂层钢板。在沉积室中，通过电子束辐照分别蒸发锌和合金金属，连续沉积在钢带上。研究了Zn-Al、Zn-Cr、Zn-Mg、Zn-Ni和Zn-Ti合金涂层钢板的一些性能。合金金属对镀层的结晶取向有影响。Zn-Al和Zn-Mg涂层中合金成分的深度分布几乎是均匀的。其他涂层为双层结构，由金属间化合物层和富锌层组成。金属间化合物的相与二元合金的平衡相图所示的相不同。在盐雾试验中，不涂锌镁合金涂层钢具有良好的耐蚀性。该涂层的腐蚀产物层仅由不含ZnO的ZnCl2•E4Zn(OH)2组成，且ZnCl2•E4Zn(OH)2的hcp结构的c轴方向与薄膜生长方向平行。在腐蚀过程中从涂层中溶解出来的Mg离子似乎对形成这一腐蚀产物层起了作用。
Synopsis : New zinc alloy coated steel sheets have been developed by continuous vapor deposition apparatus. In a deposition chamber, zinc and alloying metal were evaporated individually by Electron-Beam (EB) irradiation, and were deposited on steel strip continuously. Some properties of Zn-Al, Zn-Cr, Zn-Mg, Zn-Ni and Zn-Ti alloy coated steel sheets were investigated. Crystal orientation of these coatings was affected by alloying metals. Depth profiles of alloy composition in Zn-Al and Zn-Mg coatings are almost uniform. The other coatings had double-layered structure, composed of an intermetallic compound layer and a zinc rich layer. The intermetallic compound phases were not the same as those shown in a equilibrium phase diagram for binary alloys. Corrosion resistance of Zn-Mg alloy coated steel without painting is excellent in salt spray test. Corrosion product layer of this coating consists of only ZnCl2•E4Zn (OH)2 without ZnO and c -axis of hcp structure of ZnCl2•E4Zn(OH)2 was parallel to the direction of the film growth. Mg ion dissolved from the coating during corrosion seemed to play a role to form this corrosion product layer.