Hot galvanized steel plate water tank galvanized layer role

 Galvanized water tank if the plating is usually galvanized layer thickness of 5 ~ 15μm, and hot galvanized water tank hot galvanized layer is generally more than 65μm, or even up to 100μm. So hot-dip galvanized water tank galvanized layer coating ability is good, the coating is dense, no organic inclusion.
When the zinc layer is damaged seriously, threatening the iron matrix, the hot-dip galvanized water tank zinc to the electrochemical protection of the matrix, zinc standard potential -0.76V, iron standard potential -0.44V, zinc and iron to form a micro-battery zinc as anode Is dissolved and iron is protected as a cathode. So the hot galvanized on the base metal iron anti-atmospheric corrosion resistance is better than electro-galvanized. The mechanism of zinc resistance to atmospheric corrosion in hot-dip galvanized water tanks is mechanical protection and electrochemical protection. Under atmospheric corrosion conditions, ZnO, Zn (OH) 2 and basic zinc carbonate protective film on the surface of zinc layer, to some extent, , Hot-dip galvanized water tank zinc layer protective film (also known as white rust) will be damaged and the formation of a new film.
For more information, please visit our website: www.grp-watertank.com, or contact us with E-mail, our E-mail address is rask@coolingtowerfiller.com, you can also chat us straightly on whatsapp: 008618330029204

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