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首页> 外文期刊>Journal of Materials Science >Effect of non-toxic corrosion inhibitors on steel in chloride solution
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Effect of non-toxic corrosion inhibitors on steel in chloride solution

机译：无毒缓蚀剂对氯化物溶液中钢的影响

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The effect of certain non-toxic inhibitors on the corrosion resistance of ordinary steel in chloride solution (2 x 10(-2) M NaCl) at pH 8 was studied by polarisation curves, Raman spectroscopy and the electrochemical quartz crystal microbalance (EQCM).The inhibitors tested were ascorbic acid salts (SA) and 1-hydroxyethylidene, 1-diphosphonic acid salts (SHEDP), the results from addition inhibtors are carried in order to expect a combined effect.The polarisation curves indicated an improvement in polarisation resistance with the addition of SA or SHEDP alone. In the presence of (SA + SHEDP), the inhibiting effect were further improved. Raman spectroscopy analyses confirmed the presence of a film formed by the two inhibitors at the iron electrode surface.The individual behaviour of each inhibiteur was studied with EQCM for different chloride concentrations. The maximum of mass variation was obtained for a lower concentration in the case of SHEDP. The adsorption coverage was calculated. The Langmuir-Freundlich isotherm model is used to fit adsorption of the inhibitors. Interactions between adsorbed species were detected for SHEDP case.For inhibitor mixture, detected mass attained plateau for low(er) inhibitors concentration mixture. At higher concentration, the mass quantity was smaller than that calculated from the sum of detected mass for each alone coumpound. However it provided better protection. (C) 2004 Kluwer Academic Publishers.
机译：通过极化曲线，拉曼光谱和电化学石英晶体微量天平（EQCM）研究了某些无毒抑制剂对普通钢在pH值为8的氯化物溶液（2 x 10（-2）M NaCl）中的耐腐蚀性的影响。测试的抑制剂是抗坏血酸盐（SA）和1-羟乙叉基，1-二膦酸盐（SHEDP），通过加入缓蚀剂获得了预期的组合效果。极化曲线表明，极化电阻随极化率的提高而提高。单独添加SA或SHEDP。在（SA + SHEDP）的存在下，抑制作用进一步提高。拉曼光谱分析证实在铁电极表面存在由两种抑制剂形成的膜。用不同质量浓度的氯化物用EQCM研究了每种抑制剂的单独行为。在SHEDP的情况下，较低的浓度可获得最大的质量变化。计算吸附覆盖率。 Langmuir-Freundlich等温线模型用于拟合抑制剂的吸附。对于SHEDP案例，检测了吸附物质之间的相互作用。对于抑制剂混合物，对于低浓度的抑制剂混合物，检测到的质量达到平稳。在较高的浓度下，质量数小于从每个单独的化合物的检测质量总和计算得出的质量数。但是，它提供了更好的保护。 （C）2004 Kluwer学术出版社。

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