新能源汽车空调出风中白色粉沫的形成机理分析  

Analysis of the Blowing White Powder from the Air Conditioning Box of New Energy Vehicles

作　　者：倪雷[1] Ni Lei(SAIC Motor Passenger Vehicle Company,Shanghai 201804)

机构地区：[1]上海汽车集团股份有限公司乘用车公司,上海201804

出　　处：《汽车工艺与材料》2024年第8期50-54,共5页Automobile Technology & Material

摘　　要：通过能谱、金相检测,对路试车空调出风中夹杂的白色粉末进行了分析,确认该粉末是蒸发器腐蚀后形成的铝氧化物。红外检测和耐腐蚀性试验结果表明,在潮湿环境中,蒸发器在Cu的催化作用下发生了电偶腐蚀。采取了更换材料和采用耐腐蚀性更强的钝化、亲水药水的解决措施,有效解决了蒸发器腐蚀,导致空调出风时吹出白色粉末的问题。The problem of blowing white powder from the air conditioning box of the test car is analyzed by means of energy spectrum and metallographic analysis,and it is confirmed that white powder is an oxide of aluminum formed after corrosion of the evaporator.Through infrared and corrosion resistance test analysis,the results show that the serious corrosion is caused by the evaporator in a humid environment in which galvanic corrosion occurred under the catalysis of Cu.The solutions such as replacing materials and using passivation and hydrophilic chemicals with higher corrosion resistance are proposed so as to effectively solve the problem of blowing white powder in air conditioning boxes because of the evaporator’s corrosion.

关 键 词：空调箱 蒸发器 白色粉末 腐蚀 

分 类 号：U463.85[机械工程—车辆工程]