首页> 外文期刊>Arabian Journal for Science and Engineering >INVESTIGATION OF THE INHIBITING EFFECT OFCARBOXYMETHYICELLULOSE-Zn~(2+) SYSTEM ON THE CORROSION OF CARBON STEEL IN NEUTRAL CHLORIDE SOLUTION
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INVESTIGATION OF THE INHIBITING EFFECT OFCARBOXYMETHYICELLULOSE-Zn~(2+) SYSTEM ON THE CORROSION OF CARBON STEEL IN NEUTRAL CHLORIDE SOLUTION

机译:羧甲基纤维素-Zn〜(2+)体系对中性氯化物溶液中碳钢腐蚀抑制作用的研究

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摘要

The inhibition efficiency (IE) of carboxymethyl cellulose (CMC) -Zn ~(2+) system in controlling the corrosion of carbon steel in 120 ppm chloride solution has been evaluated by mass-loss method, potentiodynamic polarization study, and AC impedance spectra. A formulation consisting of 250 ppm of CMC and 100 ppm of Zn~(2+) has an inhibition efficiency (IE) of 97% at pH 7. However IE decreases sharply at low and high pH. Polarization studies show that the CMC -Zn~(2+) system functions as a mixed inhibitor but predominantly controls the anodic reactions. AC impedance spectra and AFM studies reveal the formation of a protective film on the metal surface. The FTIR spectrum shows the presence of Fe~(2+) -CMC complex and Zn(OH)_2 in the film.
机译:通过质量损失法,电势极化研究和交流阻抗谱,评估了羧甲基纤维素(CMC)-Zn〜(2+)体系对碳钢在120 ppm氯化物溶液中的腐蚀的抑制效率(IE)。由250 ppm的CMC和100 ppm的Zn〜(2+)组成的配方在pH值为7时的抑制效率(IE)为97%。但是,在低pH和高pH下,IE都会急剧下降。极化研究表明,CMC -Zn〜(2+)系统起混合抑制剂的作用,但主要控制阳极反应。交流阻抗谱和原子力显微镜研究表明,在金属表面上形成了保护膜。 FTIR光谱表明薄膜中存在Fe〜(2 +)-CMC络合物和Zn(OH)_2。

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