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2 AZ91D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 2 Corrosion rate and inhibition efficiency of AZ91D 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 0.106 - 48 0.062 - 72 0.043 - 35 24 0.112 - 48 0.078 - 72 0.048 - 50 24 0.135 - 48 0.088 - 72 0.056 - 3.5%NaCl + 1 g/L NBA 25 24 0.342 -222.6 48 0.191 -208.1 72 0.128 -197.7 35 24 0.365 -225.9 48 0.220 -182.1 72 0.158 -229.2 50 24 0.497 -268.1 48 0.280 -218.2 72 0.207 -269.6