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首页> 外文期刊>Journal of Iron and Steel Research International >Anticorrosion Performance of Carbon Steel in 55 percent LiBr Solution Containing PMA/SbBr_3 Inhibitor
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Anticorrosion Performance of Carbon Steel in 55 percent LiBr Solution Containing PMA/SbBr_3 Inhibitor

机译：碳钢在55％含PMA / SbBr_3抑制剂的LiBr溶液中的防腐性能

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摘要

The anticorrosion performance of carbon steel in 55 percent LiBr solution containing PMA/SbBr_3 inhibitor was studied by weight-loss tests, electrochemical measurements and surface analysis. In 55 percent LiBr+PMA/SbBr_3 solution, corrosion rates of carbon steel at 145 deg C , 175 deg C , 190 deg C and 240 deg C are 18.32 mu m centre dot a~(-1) , 27.68 mun m centre dot a~(-1) , 53.58 mu m centre dot a~(-1) and 73.78 mu m centre dot a~(-1), respectively. PMA/SbBr_3 inhibitor may inhibit the corrosion of carbon steel in 55 percent LiBr solution effectively. Especially, it shows an excellent corrosion inhibition performance at high temperature. Both anodic and cathodic reactions of carbon steel may be inhibited by PMA/SbBr_3 inhibitor, so it may be classified as mixed inhibitor. In 55 percent LiBr+PMA/SbBr_3 solution, the apparent activation energy of the corrosion reaction of carbon steel is 29.61 kJ centre dot mol~(-1). The corrosion inhibition mechanism of PMA/SbBr_3 is suggested as follows: PMA has the effect of inhibiting hydrogen evolution and a strong oxidizing property; Sb~(3+) also exhibits oxidizing properties, and can exist stably with PMA in LiBr solutions; the passive film comprising Fe_2 O_3 and antimony formed on carbon steel surface may prevent Br~(-) from diffusing into the metal surface due to the synergistic effect of PMA and Sb~(3+); As a result, the anticorrosion performance of carbon steel may be improved by PMA/SbBr_3 inhibitor in 55 percent LiBr solution.
机译：通过失重测试，电化学测量和表面分析研究了碳钢在含PMA / SbBr_3抑制剂的55％LiBr溶液中的防腐性能。在55％LiBr + PMA / SbBr_3溶液中，碳钢在145°C，175°C，190°C和240°C的腐蚀速率分别为18.32μm中心点a〜（-1），27.68 munm中心点a 〜（-1），中心点a〜（-1）为53.58μm，中心点a〜（-1）为73.78μm。 PMA / SbBr_3抑制剂可有效抑制55％LiBr溶液中碳钢的腐蚀。特别是在高温下显示出优异的腐蚀抑制性能。碳钢的阳极和阴极反应均可被PMA / SbBr_3抑制剂抑制，因此可归为混合抑制剂。在55％LiBr + PMA / SbBr_3溶液中，碳钢腐蚀反应的表观活化能为29.61 kJ中心点mol〜（-1）。提出了PMA / SbBr_3的缓蚀机理：PMA具有抑制氢逸出和强氧化性的作用。 Sb〜（3+）也具有氧化性，可以与PMA在LiBr溶液中稳定存在。在碳钢表面上形成的由Fe_2O_3和锑构成的钝化膜可以防止由于PMA和Sb〜（3+）的协同作用，使Br〜（-）扩散到金属表面。结果，在55％LiBr溶液中使用PMA / SbBr_3抑制剂可以改善碳钢的防腐性能。

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