液压支架用浓缩液防腐蚀性能研究

Study on anti-corrosion property of concentrate fluid for powered support

为研究液压支架用浓缩液的防腐蚀性,采用均匀全浸试验、扫描电镜图像表征、EDS分析和电化学极化曲线测试,分析了15#碳钢在陕北矿业典型矿井水中的腐蚀行为,研究了浓缩液对15#碳钢的防腐性能及机理。结果表明,15#碳钢在典型矿井水中0.5h有明显腐蚀发生;在典型矿井水配制3%(质量比)浓缩液中720h外观光亮,缓蚀率约达99.27%;浓缩液主要通过阳极钝化而起到缓蚀作用,使15#碳钢自腐蚀电位正移约350mV,在弱极化区缓蚀率约达95.38%,在强极化区降低电流密度约2-4个数量级;当极化电位在0-700mV(vs.OCP)区间,极化电流密度均小于0.01mA/cm^(2)。

Uniform corrosion-methods of immersion testing, image-representation with scanning electron microscope(SEM),energy disperse spectroscopy(EDS) and polarization curve were used to study the anti-corrosion property of concentrate fluid used for powered support on carbon steel in Shanbei coal mine water. The corrosion behavior of 15# carbon steel in mine water was analyzed, and the anti-corrosion property and mechanism of concentrate fluid on 15# carbon steel was studied. The results showed that the 15# carbon steel would corrode in typical mine water within 0.5 h. But it would keep bright in typical mine water with 3% concentrate fluid within 720 h, and the ratio of anti-corrosion was 99.27%.The concentrate fluid had a suppressing effect on anodic reaction and made corrosion potential of 15# carbon steel deviate positively about +350 mV, and the ratio of anti-corrosion was about 95.38% in weak polarization region, and decreased the current density about 2-4 orders of magnitude in strong polarization region, the polarized current density would be less than 0.01 mA/cm^(2), when polarization potential of 15# carbon steel in typical mine water with 3% concentrate fluid was 0-700 mV(vs.OCP).