基于电站风机表面保护的热喷涂和聚合物涂层研究

Thermal Spraying and Polymer Coating Based on Fan Surface Protection in Power Plant

针对燃煤电厂风机等低温烟气过流设备的腐蚀状况,采用了数十种聚合物涂料涂装制备成涂层试样。根据风机中腐蚀和磨损共存的现象,采用多种合金丝材,应用高速电弧喷涂设备,喷涂制备了几十种热喷涂涂层试样。选用在风机现场收集物配制成的腐蚀溶液,利用创新设计的一种新型组合式容器,对这两类涂层试样分别进行了超过6000h和10000h的环境、热态温度条件下的全浸渍单向腐蚀试验,最后锁定了耐酸蚀性能突出的W2和W16两种聚合物涂层和耐蚀抗磨性能较好的15#热喷涂涂层。在检测计算和分析比较的基础上,对这两类涂层的多项指标进行了客观的评价。并提出了提高电站风机表面保护涂层耐蚀抗磨性能的下一个新目标。

In view of the corrosion of low temperature flue gas overcurrent equipment such as fans in coal-fired power plants,Dozens of polymer coatings were used to prepare coating samples.According to the co-existence of corrosion and wear in the fan,dozens of samples of thermal spraying coating were prepared by using a variety of alloy wires and high-speed arc spraying equipment.Using a new type of combined vessel designed innovatively,the corrosion solution which is made up of the collected materials in the fan field is selected to carry out the full immersion unidirectional corrosion test of the two kinds of coating samples under the environment of more than 6000h and 10000h and the temperature of hot state respectively.At last,two kinds of polymer coatings W2 and w16 with outstanding acid resistance and 15#thermal spray coating with good corrosion and wear resistance were locked.On the basis of test calculation and analysis comparison,several indexes of these two kinds of coatings are evaluated objectively.In addition the next goal of improving the corrosion and wear resistance of the protective coating on the fan surface of power plant is put forward.