Chitosan Combined with Ammonium Paratungstate as Anticorrosive Coatings

Image of Chit-APT coating

Chitosan (Chit) is a non-toxic derivative of chitin, namely the β-(1,4)- linked polysaccharide of D-glucosamine. Application of chitosan coatings on substrates by the dip coating technique was proved to be highly effective in corrosion prevention by producing thin layers with controlled characteristics. The transparency of chitosan coatings also constitutes an advantage as it does not change the appearance of the underlying substrate.

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Thermal Decomposition of Ammonium Paratungstate in Hydrogen

image of hydrogen gas

Thermal decomposition of ammonium paratungstate (APT) in air has been investigated previously. The thermal decomposition of ammonium paratungstate (APT) in hydrogen (H2) now has been studied to investigate the decomposition process.

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Low-Temperature Hydrothermal Reduction of Ammonium Paratungstate

Image of ammonium tungsten bronze

Ammonium paratungstate (APT), is an important starting material in tungsten industry. Through reduction of APT, produces most of the tungsten products, including tungsten trioxide, tungsten bronze, etc.

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Preparation Of Ammonium Paratungstate Using Low Grade Tungsten Concentrate

Image of tungsten concentrate

Low grade tungsten concentrate has such characteristics as a high content of calcium and impurities, and a low content of WO3. But it has a lower price than standard tungsten concentrate.

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Tungsten Alloy Application – Military Industry

tungsten alloy in aerospace image

Tungsten alloy application in military industry is mainly for aerospace, weapon and nuclear industry. Tungsten alloy (WHA) is heavy metal with main content of tungsten 90~97%, and other elements, such as copper, nickel, iron, manganese, and molybdenum.

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