采用全浸、半浸和盐雾等试验方法研究了钢板热镀55 %Al-Zn合金镀层在3%NaCl的盐水溶液中的腐蚀行为.观察分析了镀层的组织结构和在盐水中 腐蚀后的表面形貌及腐蚀产物,阐述了镀层在盐水中的腐蚀过程和机理.结果表明55%Al-Zn 合金镀层比Zn镀层更耐蚀,并同样具有Zn镀层对钢基体的保护能力.
The corrosion behaviors of hot-dip 55%Al-Zn alloy co ating on steel in 3% NaCl solution were studied by fully immersion and partialy immersion in the solution and salt spray respectively. The coating microstructur e and morphology after corrosion were observed. The corrosion process and mechan ism of 55%Al-Zn alloy coating in salt water were illuminated. Results showed tha t 55%Al-Zn alloy coating was more corrosion resistant than galvanized coating, a nd had the same ability as galvanized coating to protect the steel.
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