柔性陶瓷涂料在盐湖钾盐生产设备的应用及耐蚀性能研究

Application and Corrosion Resistance of Flexible Ceramic Coatings in Potassium Salt Production Equipments

盐湖资源开发过程中,金属材料腐蚀问题对设备的安全运转和生产的连续稳定运行造成很大危害。因此设备的腐蚀防护是盐湖资源开发的基本保障之一。以陶瓷颗粒为主要填料、改性环氧树脂为成膜物,开发出可应用于盐湖苛刻工况环境中的柔性陶瓷涂料,并对涂层基本物理机械性能和耐腐蚀性能进行研究。结果表明:柔性陶瓷涂料耐磨性好,在喷砂钢材表面附着力可达20.3 MPa,综合机械性能优良;涂层的耐化学溶剂性能良好,室温下,在10%NaCl溶液,10%NaOH溶液中浸泡30天后涂层表面无任何变化;在30%H_(2)SO_(4)溶液中浸泡30天后涂层有轻微变色,在10%HCl溶液中浸泡30天后涂层起泡,无红锈;应用于热溶生产氯化钾工艺中的浓密机底流泵管接头内壁防护,可有效提高设备的使用寿命。

During the development of salt lake resources,the corrosion of metal materials has caused great harm to the safe operation of equipment and the continuous and stable operation of production.Therefore,corrosion protection of equipment is one of the basic guarantees for the exploitation of salt lake resources.In this paper,the flexible ceramic coating which can be applied to the harsh working conditions of salt lake was developed with ceramic particles as the main filler and modified epoxy resin as the film forming material,and its basic physical mechanical properties and corrosion resistance were studied.The results showed that the flexible ceramic coating had good wear resistance,the adhesion on the sandblasted steel surface could reach 20.3 MPa,and the comprehensive mechanical properties were excellent.The coating had good resistance to chemical solvents.At room temperature,the coating surface did not change after soaking in 10%NaCl solution and 10%NaOH solution for 30 d.The coating was discolored slightly after soaking in 30%H_(2)SO_(4) solution for 30 d,and bubbled after soaking in 10%HCl solution for 30 d.It can be applied to the inner protection coating of underflow pump of thickener in hot solution production of potassium chloride,which can effectively improve the service life of equipment.