发动机散热器中不溶物鉴定结果及其成因分析

Identification and Source Analysis of Insoluble Substances in Engine Radiator

采用傅里叶红外光谱仪、能谱仪、热分析仪对2款车用发动机散热器中的不溶物进行了鉴定研究,并根据试验结果对其产生的原因进行了分析。结果表明,由于2款发动机散热器防冻液使用的环境不同,红外分析结果和能谱结果综合显示2种不溶物的成分类型不同:一种不溶物主要为铝和锌的草酸盐、硅酸盐;另一种不溶物以铁的氧化物或羟基氧化物、草酸盐类为主。为了减缓冷却液对发动机散热器系统管道内壁的腐蚀和堵塞影响,建议采用具有缓释作用、缓冲作用的有品质保障的防冻液。

The insoluble substances in the radiator of two vehicle engines are identified by Fourier transform infrared spectroscopy,energy dispersive spectrometer and thermal analyzer,and the causes are analyzed according to the test results.The results show that due to the different use environments of the two engine radiator antifreezes,the infrared analysis results and energy spectrum results indicate that the composition types of the two insoluble substances are different:one is mainly oxalate and silicate of aluminum and zinc,the other is mainly iron oxide or hydroxyl oxide and oxalate.In order to reduce the corrosion and blockage of coolant on the inner wall of engine radiator system pipe,it is recommended to use the antifreeze with slow-release and buffering effects and with quality assurance.