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首页> 外文期刊>Applied Surface Science >Corrosion inhibition behavior of propyl phosphonic acid-Zn~(2+) system for carbon steel in aqueous solution
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Corrosion inhibition behavior of propyl phosphonic acid-Zn~(2+) system for carbon steel in aqueous solution

机译：丙基膦酸-Zn〜（2+）体系对碳钢水溶液的缓蚀性能

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摘要

The effectiveness of propyl phosphonic acid (PPA) as a corrosion inhibitor in association with a bivalent cation like Zn~(2+) has been studied. An eco-friendly inhibitor in controlling corrosion of carbon steel in neutral aqueous medium in the absence and presence of Zn~(2+) has been evaluated by gravimetric method. Impedance studies of the metal/solution interface indicated that the surface film is highly protective against the corrosion of carbon steel in the aqueous environment. Potentiodynamic polarization studies showed that the inhibitor is a mixed inhibitor. X-ray photoelectron spectroscopic analysis (XPS) of the protective film exhibited the presence of the elements viz., iron, phosphorus, oxygen, carbon and zinc. The chemical shifts in the binding energies of these elements inferred that the surface film is composed of oxides/hydroxides of iron(III), Zn(OH)_2 and [Fe(II)/(III)-Zn(II)-PPA] complex. Further, the surface analysis techniques viz., FT-IR, AFM and SEM studies confirm the formation of an adsorbed protective film on the carbon steel surface. Based on all these results, a plausible mechanism of corrosion inhibition is proposed.
机译：研究了丙基膦酸（PPA）作为腐蚀抑制剂与诸如Zn〜（2+）之类的二价阳离子的有效性。通过重量分析法评价了在不存在和存在Zn〜（2+）的情况下控制碳钢在中性水性介质中腐蚀的生态友好抑制剂。对金属/溶液界面的阻抗研究表明，表面膜对水性环境中的碳钢腐蚀具有高度的保护作用。电位动力极化研究表明该抑制剂是混合抑制剂。保护膜的X射线光电子能谱分析（XPS）表明存在元素，即铁，磷，氧，碳和锌。这些元素的结合能发生化学位移，推测表面膜由铁（III），Zn（OH）_2和[Fe（II）/（III）-Zn（II）-PPA]的氧化物/氢氧化物组成。复杂。此外，表面分析技术，即FT-IR，AFM和SEM研究证实了在碳钢表面上形成了吸附保护膜。基于所有这些结果，提出了合理的缓蚀机理。

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