二氧化氯介质中脂肪醇聚氧乙烯醚及其复配缓蚀剂对Q235钢的缓蚀作用

The Corrosion Inhibition Effect of Fatty Alcohol Ethoxylates and Its Complexd Inhibitors in the Chlorine Dioxide Media for Q235 Steel

通过静态失重法、动电位极化曲线法及观察显微形貌,研究了脂肪醇聚氧乙烯醚(平平加O-20)及其复配缓蚀剂在100 mg/L二氧化氯介质中对Q235钢的缓蚀效应。结果表明:平平加O-20对Q235钢有一定的缓蚀效果,但单独使用时的用量较大;平平加O-20与硝酸钠、钼酸钠、苯甲酸钠均有缓蚀协同效果,与苯甲酸钠复配的缓蚀协同效应最明显;当苯甲酸钠和平平加O-20复配的质量浓度比为6:4,总用量为300 mg/L时,最大缓蚀效率可达92.55%。

The static weight loss method, potentiodynamic polarization and observing microscopic appearance were used to study the synergistic effect of fatty alcohol ethoxylates （ peregal O-20） and complexd inhibitors on corrosion inhibition of Q235 steel in the chlorine dioxide media of 100 mg/L. The results show that peregal O-20 has a corrosion inhibiting effect for Q235 steel, but the amount of corrosion inhibitor is large when used alone ; Composite peregal O-20 with sodium nitrate or sodium mo- lybdate or sodium benzoate can produce synergistic inhibition effect on Q235 steel, when composite with sodium benzoate can produce the most obvious synergistic inhibition effect; When the concentration ratio of sodium benzoate and peregal 0-20 is 6 ： 4 and the total dosage of 300 mg/L,the maximum inhibition efficiency can achieve 92.55%.