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Silicate esters with additives as temporary protectives on steel surfaces

机译：硅酸酯与添加剂作为钢表面的临时保护剂

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摘要

A series of tetra-alkoxysilanes and dimethyldialkoxysilanes (silicate esters) was prepared by reacting SiCl4 and (CH3 )2 SiCl2 respectively with corresponding alcohols. The performance of these silicate esters as temporary protectives for mild steel surfaces has been studied by assessing the time to appearance of the first rust spot on the specimen surface, electro chemical potential changes, and the percentage protection given by these esters to steel plates under different conditions using natural sea water containing 1%Na2 SO4 with various additives including thiourea and nicotinic acid. The corrosion resistance imparted by dimethyldialkoxysilanes is greater than that imparted by tetra-alkoxysilanes. However, for both series of silicate esters, those which have high molecular weight and branching in the alkyl fraction confer better corrosion resistance than those with low branching and a linear structure. Similar measurements were made for steel coated with silicone fluid and liquid paraffin and for uncoated steel for the purpose of comparison.
机译：通过使SiCl 4 与（CH 3 ） 2 SiCl 2反应制备一系列四烷氧基硅烷和二甲基二烷氧基硅烷（硅酸酯） 和相应的醇。通过评估试样表面第一个锈斑出现的时间，电化学势的变化以及这些酯在不同条件下对钢板的防护百分比，研究了这些硅酸酯作为低碳钢表面临时保护剂的性能。使用含有1％Na 2 SO 4 的天然海水和各种添加剂（包括硫脲和烟酸）的条件。二甲基二烷氧基硅烷赋予的耐腐蚀性大于四烷氧基硅烷赋予的耐腐蚀性。然而，对于这两种硅酸酯，与那些具有低支化和线性结构的那些相比，那些具有高分子量和在烷基部分中具有支化的硅酸酯具有更好的耐腐蚀性。为了进行比较，对涂有硅酮液体和液体石蜡的钢和未涂层的钢进行了类似的测量。

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  • 来源
    《British Corrosion Journal》 |1999年第1期|75-78|共4页
  • 作者

    Alagar M.; Mohammed Bilal I.; Mohan V.;

  • 作者单位

    The Department of Chemical Engineering, Alagappa College of Technology, Madras, 600025, India;

    The Department of Chemistry, Crescent Engineering College, Vandalur, Madras, 600048, India;

    The Department of Chemical Engineering, Alagappa College of Technology, Madras, 600025, India;

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