Enamel glaze powder and water heater enamel liner

Abstract

The invention provides enamel glaze powder and an enamel liner of a water heater. The enamel glaze powder is used for the enamel liner of the water heater and is prepared from the following raw materials in parts by weight: 45 to 47 parts of SiO2, 0.1 to 0.2 part of Al2O3 nanoparticle, 12 to 13 parts of B2O3, 0.6 to 0.7 part of Fe2O3, 11 to 12 parts of Na2O, 4.5 to 5.5 parts of K2O, 3.1 to 3.4 parts of NaF, 3 to 3.5 parts of CoO, 1.5 to 2 parts of NiO, 0.25 to 0.3 part of MnO2, 2.2 to 2.8 parts of Li2O and 1 to 2 parts of CaO. The enamel liner of the water heater, which is prepared from the enamel glaze powder, can be subjected to 1 million times of pulse impacting tests (with rated pressure of 0.85MPa), and the utilization requirements of commercial-grade water heater products are met.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to an enamel glaze powder and an enamel liner for a water heater. Background technique [0002] At present, the inner tanks of water storage water heaters on the market are mainly stainless steel inner tanks and enamel inner tanks. The manufacturing process of the stainless steel liner is relatively complicated, and its corrosion resistance, acid and alkali resistance are poor, and it is easy to scale. The welding part is easy to oxidize and rust when exposed to high temperature, which will eventually lead to water leakage in the water tank or even the scrapping of the entire water heater. The enamel liner is made by coating the enamel shaft on the steel plate after proper treatment and firing at high temperature. It has the stability of steel (compression resistance, sufficient strength) and the excellent performance of glass enamel, such as corrosion resistance and non-toxi...

AI Technical Summary

Problems solved by technology

However, air bubbles or needle holes are likely to occur during the production process of the enamel liner. At the same time, the enamel is relatively brittle, and vibrations and collisions are prone to scale explosions.

In addition, enamel will gradually dissolve and peel off in hot water, which is technically called "boiling water weight loss". Over time, enamel falling off will pollute water quality, rust and leak.

Existing enamel liner water heaters (including electric water heaters, solar water heaters, air energy heat pump water heaters, etc.) often fail to meet the 8-year service life of water heaters stipulated by the state, and some even within 1-2 years in areas with poor water quality water leakage

Since the inner tank is usually unable to be repaired after water leakage, the water tank or even the entire water heater is scrapped, resulting in waste of resources and complaints from users

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