室外型冷凝机组金属部件耐腐蚀性能影响因素研究

Research on corrosion resistance influencing factors of metal parts in outdoor condensing units

概述室外机金属部件暴露于大气中的腐蚀机制及金属部件耐腐蚀性能的影响因素。采用正交试验方法,以盐雾试验后的红锈面积作为判断标准,针对影响金属耐腐蚀性能的3个重要因素(金属基材、喷涂方式和涂膜厚度)及其两两交互作用对室外机金属部件耐腐蚀性能的影响程度进行试验对比。结果表明:喷涂方式对耐腐蚀性能影响最大,金属基材、金属基材与喷涂方式的交互作用对金属耐腐蚀性能影响较大。因此正确选择喷涂方式和金属基材并考虑2种影响因素的交互关系对提高室外机金属部件耐腐蚀性能具有重要意义。

Both the corrosion mechanism and the corrosion resistance influencing factors of the metal parts in outdoor units exposed in the air are summarized.Regarding the red rust area as the criterion,the experiments are made in order to judge the influence degree of the three important factors：metal backing,spray technology,coating thickness,and the pairwise interaction with the orthogonal experimental method.The results indicate that spray technology influences the corrosion resistance most.The metal backing,and the interaction of the metal backing and spray technology can influence the corrosion resistance obviously.Therefore,correctly selecting the spray technology,metal backing and taking their interaction into consideration are important for enhancing corrosion resistance of outdoor metal parts.