6061铝合金与30CrMnSiA结构钢在模拟工业-海洋大气环境下的电偶腐蚀防护

发布时间：2018-08-15 17:07

【摘要】：重点研究6061铝合金和30CrMnSiA结构钢在模拟工业-海洋环境下的电偶腐蚀防护。以表面阳极氧化及有机涂层处理的6061铝合金、表面镀镉及涂层处理的30CrMnSiA结构钢为实验材料,将试样装配成标准电偶试样,对其进行氙灯老化和周期浸润实验,并对腐蚀后的试样进行分析。结果表明:仅采用表面阳极氧化处理的6061铝合金的强度σb和塑性δ损失较大,σb和δ分别下降了约24.2%和13.4%。而采用环氧聚酰胺底漆和丙烯酸聚氨酯面漆的复合防护涂层的6061铝合金强度和塑性损失较小,σb和δ分别下降约4%和5%。且无涂层试样的平均点蚀坑深度明显大于有涂层试样的,最高相差32μm,表明此涂层可减弱电偶腐蚀。
[Abstract]:The galvanic corrosion protection of 6061 aluminum alloy and 30CrMnSiA structural steel in simulated industrial-marine environment was studied. Using 6061 aluminum alloy treated by anodic oxidation and organic coating, 30CrMnSiA structural steel coated with cadmium and coating as the experimental material, the sample was assembled into standard galvanic sample, and the xenon lamp aging and periodic soaking test were carried out on the sample. The samples after corrosion were analyzed. The results show that the strength 蟽 b and plastic 未 loss of 6061 aluminum alloy treated only by surface anodizing are larger, and 蟽 b and 未 decrease by about 24.2% and 13.44%, respectively. The strength and plastic loss of 6061 aluminum alloy with epoxy polyamide primer and acrylic polyurethane topcoat were smaller, 蟽 b and 未 decreased by about 4% and 5%, respectively. The average pitting pit depth of the uncoated specimen is obviously higher than that of the coated sample, and the maximum difference is 32 渭 m, which indicates that the coating can reduce the weak galvanic corrosion.
【作者单位】：北京科技大学腐蚀与防护中心;北京科技大学腐蚀与防护教育部重点实验室;桂林理工大学有色金属及材料加工新技术教育部重点实验室材料科学与工程学院;
【基金】：国家重点基础研究发展计划资助项目(2014CB643300) 国家自然科学基金资助项目(51471033) 国家材料环境腐蚀平台
【分类号】：TG174.3

【参考文献】