Ammonium Metatungstate in Anti-Corrosion Coatings

Ammonium metatungstate (AMT) plays a significant role in the field of anti-corrosion coatings, as it serves as an ideal precursor for tungsten-based coating materials, exhibiting excellent corrosion resistance. Specific applications include:

1. Marine Engineering Equipment: AMT can be used to prepare tungsten-based coatings through solution impregnation or spraying methods, applied to the metal surfaces of marine engineering equipment (such as ship steel structures and offshore platforms). Upon decomposition at high temperatures (above 300°C), AMT forms a dense tungsten oxide (WO₃) layer, which offers excellent resistance to salt spray corrosion, effectively protecting against chloride ion erosion in seawater and extending the service life of the equipment.

2. Chemical Pipelines: Tungsten-based coatings prepared from AMT can be used for the internal protection of chemical pipelines, particularly in acidic or alkaline environments. The high chemical stability and heat resistance of the WO₃ coating (capable of withstanding temperatures above 500°C) enable it to resist corrosion from strong acids (such as sulfuric acid and hydrochloric acid) and strong alkalis, making it suitable for transport pipelines and reactor linings in chemical plants.

3. Aerospace Components: AMT can be applied to the surface coating of metal components in the aerospace sector (such as turbine blades and engine parts). Tungsten-based coatings not only provide anti-corrosion protection but also enhance the high-temperature oxidation resistance of the components, maintaining stability in high-temperature and high-pressure environments, making them suitable for the protection of aircraft engines and spacecraft shells.