3.5%NaCl溶液中硝基巴比妥酸对AZ31B与AZ91D镁合金腐蚀的缓蚀作用及机理研究

翟亚如, 熊金平, 赵景茂

Corrosion Inhibition Performance of Nitrobarbituric Acid on Mg-alloys AZ31B and AZ91D in 3.5%NaCl Solution

ZHAI Yaru, XIONG Jinping, ZHAO Jingmao

表1 AZ31B在3种温度下的含1 g/L NBA的3.5%NaCl溶液中的腐蚀速率和缓蚀率

Table 1 Corrosion rate and inhibition efficiency of AZ31B soaked in 3.5%NaCl solution with or without adding 1 g/L NBA at three temperatures

Solution Temperature / ℃ Time / h Corrosion rate / g·m-2·h-1 ηw / % 3.5%NaCl 25 24 1.029 - 48 1.198 - 72 1.195 - 35 24 2.276 - 48 1.907 - 72 2.126 - 50 24 3.704 - 48 5.596 - 72 6.473 - 3.5%NaCl + 1 g/L NBA 25 24 0.603 41.4 48 0.318 73.5 72 0.222 81.4 35 24 0.773 66.0 48 0.461 75.8 72 0.290 86.4 50 24 0.805 78.3 48 0.576 89.7 72 0.515 92.0