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前言 热双金属片是在电气工程和家用电器中广泛地用作测温电热自动控制装置的热敏元件材料。为了在使用过程中不改变其热敏特性和其它物理性能,一般情况下,表面不宜用复盖层进行防护,而是裸体金属直接在产品中使用。 目前,用量最多的热双金属片是5J18和5J11。在实际使用中,由于5J11主动层易发黑,致使许多使用单位认为5J18的耐蚀性能比5J11好。然而在环境试验及产品实际运行过程中,热双金属片的锈蚀,又使人们担忧
Preface Hot bimetal is widely used in electrical engineering and household appliances as a thermal sensor material for temperature control electrothermal automatic control device. In order to not change its thermal characteristics and other physical properties during use, in general, the surface should not be covered with a cover, but the naked metal is used directly in the product. At present, the hottest bimetal sheets are 5J18 and 5J11. In actual use, due to the 5J11 active layer is easy to black, resulting in many units that 5J18 corrosion resistance better than 5J11. However, in the environmental test and the actual operation of the product, the thermal bimetal corrosion, but also make people worry