Corrosion inhibition of A3 steel by imidazoline derivative in 2·0%NaCl solution
Corrosion inhibition of A3 steel by imidazoline derivative in 2·0%NaCl solution
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DOI：
10.1179/1743278212y.0000000046
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
F L Zeng;X. Tan;J F Li;Z. Zhang
中科院分区：
文献类型：
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作者：
F L Zeng;X. Tan;J F Li;Z. Zhang
采用失重法、动电位极化曲线、电化学阻抗谱和扫描电镜研究了一种咪唑啉衍生物在2%NaCl溶液（pH 4.0 ~ 6.9）中对A3钢的缓蚀作用。结果表明，咪唑啉衍生物作为阳极型缓蚀剂，通过吸附在钢表面抑制电荷转移过程。pH 4·9时的抑制效率（IE）随着咪唑啉衍生物浓度在50-250 mg L-1范围内而增加。同时，A3钢在中性溶液中的IE优于酸性溶液。在长时间的浸泡过程中，IE随着浸泡时间的增加先增加。虽然随着时间的延长，它略有下降，但观察到良好的抑制性能。
The corrosion inhibition of A3 steel by an imidazoline derivative in 2%NaCl solution (pH 4·0-6·9) was investigated using weight loss method, potentiodynamic polarisation, electrochemical impedance spectroscopy and scanning electron microscopy (SEM) observations. It is suggested that the imidazoline derivative acts as an anodic type inhibitor, suppressing the charge transfer process by adsorption on the steel surface. The inhibition efficiency (IE) at pH 4·9 increases with the imidazoline derivative concentration in the range of 50-250 mg L−1. Meanwhile, the IE for A3 steel in neutral solution is better than that in acidic solution. During a long time immersion, the IE increases first with the increasing immersion time. Although it decreases a little with further time extension, good inhibition performances are observed.