Journal of Appliance Science & Technology ›› 2019, Vol. 0 ›› Issue (3): 51-53.doi: 10.19784/j.cnki.issn1672-0172.2019.01.004

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Study on descaling and anti-corrosion resistance of electric heating tube for water heater

CHEN Changzhong, TAN Deqiang, HUANG Kaidong   

  1. Gree Electric Appliances, INC. of Zhuhai Zhuhai 519070
  • Online:2019-06-01 Published:2019-07-03

Abstract: Electric heating tube has been in the complex cold and hot circulation environment for a long time, and it is easy to appear scaling and corrosion. In this paper, the mechanism of scaling and pitting corrosion of electric heating tube was analyzed through comparison of scale formation, corrosion resistance and other tests. The results show that the surface of the enamel electric heating tube has low surface energy, which makes the scale loose and not easy to adhere. When the enamel layer is in contact with the medium, a silicon oxide protective film is formed, which effectively prevents pitting and stress corrosion of the stainless steel tube body.

Key words: Water heater, Electric heating tube, Descaling, Anti-corrosion, Enamel