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How To Improve Water Corrosion Resistance of Enamel

How To Improve Water Corrosion Resistance of Enamel

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  • Time of issue:2022-01-18
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(Summary description)Enamel products are highly resistant to water erosion. Under normal circumstances, cold water will hardly corrode the enamel. Only hot water

How To Improve Water Corrosion Resistance of Enamel

(Summary description)Enamel products are highly resistant to water erosion. Under normal circumstances, cold water will hardly corrode the enamel. Only hot water

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2022-01-18
  • Views:0
Information

Enamel products are highly resistant to water erosion. Under normal circumstances, cold water will hardly corrode the enamel. Only hot water or water vapor can corrode the enamel slightly, but if there are dissolved substances in the water (such as carbonic acid or carbonate) etc.) only slightly corroded the enamel.

Because of its superior water resistance and chemical stability, enamel products are widely used in various fields. Common ones are enamel for home appliances: electric water heaters, solar water heaters, etc.; enamel for sanitary ware: bathtubs, shower trays, sinks, etc.; and enamel water tanks, sewage treatment pools, exterior or interior walls of public buildings, etc.

The water resistance stability of enamel depends on the relative content ratio of SiO2 and alkali metal oxides K2O and NaO. Increasing the relative content ratio can improve the water corrosion resistance of enamel. The order of effect of alkali metal oxides on improving the water corrosion resistance of enamel is: Li+<Na+<K+. When the content of K2O and NaO exceeds 18%, the hydrolysis of enamel is enhanced, and the water corrosion resistance is relatively weakened.

Partial replacement of SiO2 with alkaline earth metal oxides or other divalent metal oxides has less effect on the chemical stability of enamels than with alkali metal oxides. Among the divalent oxides, BaO and PbO have the strongest effect on reducing the chemical stability of water resistance of enamel, followed by MgO and CaO, but if PbO is used to replace part of alkali metal oxides as flux, it is beneficial to improve the chemical stability of water resistance of enamel.

In a word, the water resistance and chemical stability of enamel mainly depends on the reasonable ratio of all the components of the enamel frit, and cannot simply look at the content of alkali metal oxides.

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