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  5. 磷酸中核桃青皮复配缓蚀剂对冷轧钢的缓蚀协同效应

磷酸中核桃青皮复配缓蚀剂对冷轧钢的缓蚀协同效应

来源 :中国腐蚀与防护学报 | 被引量 : 0次 | 上传用户：wjz5201
【摘 要】
：
采用失重法、电化学法及表面分析测试研究了农林废弃物核桃青皮提取物(WGHE)与阴离子表面活性剂十二烷基磺酸钠(SLS)对冷轧钢在2.0 mol/L H3PO4介质中的缓蚀协同效应,并对WGHE中的缓蚀有效成分进行了探究.结果 表明:单独的WGHE、SLS具有中等程度的缓蚀性能,50℃时100 mg/L的缓蚀率仅为50％左右;WGHE/SLS复配后缓蚀率不断上升,最高缓蚀率可达95.3％,两者之间存在显著的缓蚀协同效应,缓蚀协同效应系数随温度的升高而增大.WGHE/SLS复配缓蚀剂更能同时有效抑制阴极和阳极
【作 者】
：
李向红 徐昕 雷然 邓书端 
【机 构】
：
西南林业大学化学工程学院 昆明650224;西南林业大学材料科学与工程学院 昆明650224
【出 处】
：
中国腐蚀与防护学报
【发表日期】
：
2022年3期
【关键词】
：
核桃青皮 十二烷基磺酸钠 冷轧钢 缓蚀协同效应 磷酸 
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论文部分内容阅读
采用失重法、电化学法及表面分析测试研究了农林废弃物核桃青皮提取物(WGHE)与阴离子表面活性剂十二烷基磺酸钠(SLS)对冷轧钢在2.0 mol/L H3PO4介质中的缓蚀协同效应,并对WGHE中的缓蚀有效成分进行了探究.结果 表明:单独的WGHE、SLS具有中等程度的缓蚀性能,50℃时100 mg/L的缓蚀率仅为50％左右;WGHE/SLS复配后缓蚀率不断上升,最高缓蚀率可达95.3％,两者之间存在显著的缓蚀协同效应,缓蚀协同效应系数随温度的升高而增大.WGHE/SLS复配缓蚀剂更能同时有效抑制阴极和阳极反应;Nyquist图谱呈现单一弥散容抗弧,电荷转移电阻排序为:WGHE/SLS＞ WGHE＞ SLS.WGHE中主成分芦丁、槲皮素、1-甲基萘醌与SLS之间存在缓蚀协同作用,但协同性能低于WGHE/SLS复配缓蚀剂.
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