Inhibition roles of molybdate and borate on Q235 steel corrosion in resistance reducing agent
Yang Yang1, Hui Su1, Lan-lan Liu2, Song Xu3, Zhen Zhong1, Xiao-bao Zhou1, Tang-qing Wu1
1 School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, Hunan, China; 2 State Grid Hunan Electric Power Company Limited Transmission Maintenance, Changsha 410100, Hunan, China; 3 State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410007, Hunan, China
Inhibition roles of molybdate and borate on Q235 steel corrosion in resistance reducing agent
Yang Yang1, Hui Su1, Lan-lan Liu2, Song Xu3, Zhen Zhong1, Xiao-bao Zhou1, Tang-qing Wu1
1 School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, Hunan, China; 2 State Grid Hunan Electric Power Company Limited Transmission Maintenance, Changsha 410100, Hunan, China; 3 State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410007, Hunan, China
摘要 The effects of Na2MoO4 and Na2B4O7 on corrosion behavior of Q235 steel in resistance reducing agent (RRA) containing sodium bentonite were studied by mass loss, scanning electron microscopy and electrochemical measurement. The results showed that both the independent and mixed additions of Na2MoO4 and/or Na2B4O7 can reduce the corrosion rate of Q235 steel in RRA containing sodium bentonite. And the inhibition effect of NNa2MoO4 and/or Na2B4O7 increased with their dosage increase. With the same dosage, the inhibition efficiency of the mixed addition of Na2MoO4 and Na2B4O7 was higher than that of their independent addition. The passivation effect of Q235 steel was easy to obtain in the RRA with the mixed addition of Na2MoO4 and Na2B4O7 . The optimized inhibitor for the RRA containing sodium bentonite was the mixture of Na2MoO4 and Na2B4O7 with a total concentration of 1.5 wt.%. Furthermore, the increase in corrosion potential E corr and the decrease in corrosion current density icorr in carbon steel were one of the important criteria for the formation of passivation film.
Abstract：The effects of Na2MoO4 and Na2B4O7 on corrosion behavior of Q235 steel in resistance reducing agent (RRA) containing sodium bentonite were studied by mass loss, scanning electron microscopy and electrochemical measurement. The results showed that both the independent and mixed additions of Na2MoO4 and/or Na2B4O7 can reduce the corrosion rate of Q235 steel in RRA containing sodium bentonite. And the inhibition effect of NNa2MoO4 and/or Na2B4O7 increased with their dosage increase. With the same dosage, the inhibition efficiency of the mixed addition of Na2MoO4 and Na2B4O7 was higher than that of their independent addition. The passivation effect of Q235 steel was easy to obtain in the RRA with the mixed addition of Na2MoO4 and Na2B4O7 . The optimized inhibitor for the RRA containing sodium bentonite was the mixture of Na2MoO4 and Na2B4O7 with a total concentration of 1.5 wt.%. Furthermore, the increase in corrosion potential E corr and the decrease in corrosion current density icorr in carbon steel were one of the important criteria for the formation of passivation film.
Yang Yang,Hui Su,Lan-lan Liu, et al. Inhibition roles of molybdate and borate on Q235 steel corrosion in resistance reducing agent[J]. Journal of Iron and Steel Research International, 2023, 30(8): 1477-1489.
2023, Vol. 30 
