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首页> 外文期刊>Journal of Applied Polymer Science >STYRENE COPOLYMERS WITH CARBOXYL GROUPS AS CORROSION INHIBITORS FOR ZINC PIGMENTS IN AQUEOUS ALKALINE MEDIA
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STYRENE COPOLYMERS WITH CARBOXYL GROUPS AS CORROSION INHIBITORS FOR ZINC PIGMENTS IN AQUEOUS ALKALINE MEDIA

机译：碱性介质中含羧基的苯乙烯共聚物对锌颜料的腐蚀抑制剂

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摘要

Zinc pigments react in aqueous alkaline media (e.g., water-borne paints) by the evolution of hydrogen. Low molecular weight styrene-maleic acid and styrene-acrylic acid/styrene-acrylate copolymers can inhibit this corrosion reaction of zinc pigments in a mixture of water and butyl glycol in the ratio 9 : 1 at a pH value of 10 (ammonia). High molecular weight styrene-maleic acid copolymers are only very poor corrosion inhibitors. This was proved by volumetric measurement of the evolved hydrogen. There seems to be a correlation between the content of carboxyl groups of the low molecular weight styrene-maleic acid and styrene-acrylic acid/styrene-acrylate copolymers and the evolved hydrogen volume in ammoniacal aqueous medium: The lower the acid number of the styrene copolymers, the lower is the evolved hydrogen volume. Low molecular weight styrene copolymers neutralized with dimethylethanolamine inhibit the corrosion reaction much better than with ammonia. (C) 1996 John Wiley & Sons, Inc. [References: 8]
机译：锌颜料通过氢的逸出在水性碱性介质（例如水性涂料）中反应。低分子量的苯乙烯-马来酸和苯乙烯-丙烯酸/苯乙烯-丙烯酸酯共聚物可以在水和丁二醇的混合物中以9：1的比例在pH值为10（氨）时抑制锌颜料的腐蚀反应。高分子量苯乙烯-马来酸共聚物只是非常差的腐蚀抑制剂。通过放出氢的体积测量证明了这一点。低分子量苯乙烯-马来酸和苯乙烯-丙烯酸/苯乙烯-丙烯酸酯共聚物的羧基含量与氨水介质中析出的氢量之间似乎存在相关性：苯乙烯共聚物的酸值越低，较低的是放出的氢气量。用二甲基乙醇胺中和的低分子量苯乙烯共聚物比用氨水更好地抑制腐蚀反应。 （C）1996 John Wiley＆Sons，Inc. [参考：8]

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