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首页> 外文期刊>Journal of Materials Engineering and Performance >Formulation and Assessment of a Wash-Primer Containing Lanthanum 'Tannate' for Steel Temporary Protection
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Formulation and Assessment of a Wash-Primer Containing Lanthanum 'Tannate' for Steel Temporary Protection

机译：含有镧“鞣酸”的洗涤底漆的配方和评估钢临时保护

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摘要

Tannins are polyphenols synthesized by plants and useful for the coating industry as corrosion inhibitors. In addition, lanthanum salts have a great inhibitory effect on steel corrosion. The aim of this study was to obtain lanthanum "tannate" with adequate solubility to be incorporated as the corrosion inhibitor in a wash-primer. The "tannate" was obtained from commercial "Quebracho" tannin and 0.1 M La(NO3)(3). The soluble tannin was determined by the Folin-Denis reagent, while the concentration of Lanthanum was obtained by a gravimetric procedure. The protective action of "tannate" on SAE 1010 steel was evaluated by linear polarization curves and corrosion potential measurements. Lanthanum "tannate" was incorporated in a wash-primer formulation and tested by corrosion potential and ionic resistance measurements. The corrosion rate was also determined by the polarization resistance technique. Besides, the primer was incorporated in an alkyd paint system and its anticorrosion performance assessed in the salt spray cabinet and by electrochemical impedance spectroscopy. Results showed that lanthanum "tannate" primer inhibits the development of deleterious iron oxyhydroxides on the steel substrate and incorporated into a paint system had a similar behavior to the primer formulated with zinc tetroxychromate.
机译：单宁是由植物合成的多酚，并且可用于涂层工业作为腐蚀抑制剂。此外，镧盐对钢腐蚀具有很大的抑制作用。本研究的目的是获得具有足够溶解度的镧“鞣酸”，以作为洗涤底漆中的腐蚀抑制剂掺入。从商业“Quebracho”单宁和0.1MLa（NO 3）（3）获得“鞣酸”。可溶性单宁由Folin-Denis试剂测定，而通过重量序列获得镧的浓度。通过线性偏振曲线和腐蚀电位测量评估“鞣酸”对SAE 1010钢的保护作用。镧“鞣酸”掺入洗涤底漆制剂中并通过腐蚀电位和离子抗性测量进行测试。腐蚀速率也通过偏振电阻技术决定。此外，底漆掺入醇酸涂料系统中及其在盐雾柜中评估的防腐性能和电化学阻抗光谱。结果表明，镧“鞣酸”底漆抑制了钢基材上有害铁羟基氧化物的发展，并将其掺入涂料体系中对用锌三羟甲酸锌配制的引物类似的行为。

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