对硬水不敏感型液压支架用浓缩液的研究

Study on Concentrate Fluid for Hydraulic Support with Insensitivity to Hard Water

为解决液压液在水质硬度高或配液浓度低时产生的析出问题、保障液压支架跟机自动化的可靠性和稳定性,研究了环氧乙烷聚合物、环氧丙烷聚合物和不同方法改性脂肪酸的润滑性及抗硬水能力,通过腐蚀电位和腐蚀电流的变化,分析了环氧乙烷改性脂肪酸与缓蚀剂间的配伍性,制备了对硬水不敏感的HFAS10-5和HFAS40-5型浓缩液;对自制和市售的浓缩液进行了润滑性、防锈性和稳定性等方面的常规测试,同时评定了产品在2 000 mg/L硬水中不同浓度梯度下的稳定性。实验结果表明,以环氧乙烷改性脂肪酸作为润滑剂的浓缩液体系,采用无机和有机复合缓蚀剂,不但可以降低缓蚀剂的整体用量,还可以提高自腐蚀电位;不同型号浓缩液在高硬度水中不同浓度梯度下均能保持较好的稳定性。

In order to solve the problem of hydraulic fluid precipitation when the water hardness is high or the liquid concentration is low and ensure the reliability and stability of hydraulic support and machine automation,the lubricity and hard water resistance of ethylene oxide polymer,propylene oxide polymer and different methods of modified fatty acids were studied.The compatibility between ethylene oxide modified fatty acids and corrosion inhibitors was analyzed through the changes of corrosion potential and corrosion current.HFAS10-5 and HFAS40-5 types of concentrate fluid with insensitivity to hard water were prepared.The home-made and commercially available concentrates were routinely tested for lubricity,rust resistance and stability,and the stability of the products was assessed under different concentration gradients in 2000 mg/L hard water.The experimental results show that the concentrate fluid system with ethylene oxide modified fatty acids as lubricant and inorganic and organic compound corrosion inhibitor can not only reduce the overall amount of corrosion inhibitor,but also increase the self-corrosion potential.Different types of concentrate fluid can maintain good stability under different concentration gradients in high hardness water.