Abstract The inhibition effect of benzyltrimethylammonium iodide (BTAI) on the corrosion of cold rolled steel (CRS) in phosphoric acid produced by dihydrate wet method process (7.0 M H3PO4) solution was investigated for the first time by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) methods. The results show that BTAI is a good inhibitor, and the adsorption of BTAI obeys Langmuir adsorption isotherm. Polarization curves show that BTAI behaves as a mixed-type inhibitor. EIS spectra exhibit one capacitive loop and confirm the inhibitive ability. The inhibition action of BTAI is also evidenced by SEM images.

中文翻译：

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苄基三甲基碘化铵在二水湿法工艺生产的磷酸中作为钢的缓蚀剂

摘要 首次通过失重、动电位极化、电化学阻抗等研究了苄基三甲基碘化铵（BTAI）对二水湿法法磷酸（7.0 M H3PO4）溶液中冷轧钢（CRS）腐蚀的抑制作用。光谱 (EIS) 和扫描电子显微镜 (SEM) 方法。结果表明BTAI是一种良好的抑制剂，BTAI的吸附服从Langmuir吸附等温线。极化曲线表明 BTAI 表现为混合型抑制剂。EIS 光谱显示一个电容回路并确认抑制能力。SEM 图像也证明了 BTAI 的抑制作用。