What kind of non-toxic coating technology can achieve long-term corrosion protection for pipes and equipment in drinking water systems?

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What kind of non-toxic coating technology can achieve long-term corrosion protection for pipes and equipment in drinking water systems? As the living conditions of urban residents in our country improve. The urban water supply system, which is meant to complement this, is relatively underdeveloped, severely restricting the improvement of the quality of life for urban residents. Due to the increase in the number of buildings and their floor counts, centralized water supply systems have become more common, and the existing urban water supply systems struggle to meet the demand. Inadequate protection of centralized water supply systems can lead to corrosion of the equipment used in such systems, thereby affecting their service life ； Secondly, corrosion products can cause harmful dissolved substances in water to exceed permissible levels, resulting in unqualified water quality standards ； Finally, corrosion products and their adherents become a nutrient source for microorganisms such as viruses, bacteria, fungi, algae, and protozoa, leading to their proliferation and posing a threat to the safe drinking water supply for users. We know that corrosion protection for drinking water storage tanks and pipelines has high requirements in terms of safety and environmental protection, which means that the paint used must not be toxic. Moreover, treated drinking water has slight acidic or alkaline properties, so it must be able to resist acidity, alkalinity, and moisture corrosion. It is required that the coating last for over 10 years with a single application.