Auto snow brush test principle

Aluminum and replacement from mercury nitrate of mercury in formation of primary
batteries, to speed up the aluminum snow brush loss rate of electrons, mercury dissolved aluminum forms aluminum amalgam and hinder the generation of protective alumina layer, so that the auto snow brush for cars by oxygen oxidation alumina.
Aluminum is a kind of active metal, surface contact air easily alumina layer oxidized by snow brush oxygen in air to form a layer of compact thin. Protect the internal metal aluminum will not continue to be oxidation; snow brush for cars test, in the aluminum coated on the surface of mercury nitrate solution, mercuric nitrate through the protective layer, substitution reaction with aluminum, generation of liquid metal mercury. Mercury at room temperature automotive snow brush can be generated and combined with aluminum alloy aluminum amalgam, the name is called "aluminum amalgam in commonly, generating surface of aluminum aluminum amalgam, protective effect of aluminum lost alumina protective film, soon to be oxidized by oxygen in air into a solid white alumina, aluminum amalgam surface of aluminum as a result of oxidation and reduction, the aluminum foil aluminum snow brush with ice scraper will continue to dissolve into the aluminum amalgam, and continue to be oxidized into white alumina on the surface, so that the white alumina in aluminum surface accumulate.