Kaliumhydroxyoctaoxodizincatdichromat(1-)

Kaliumhydroxyoctaoxodizincatdichromat(1-) Chemische Eigenschaften,Einsatz,Produktion Methoden

Verwenden

Zinc potassium chromate is one of several chromates used as anticorrosive agents in the formulation of coatings and primers. Chromates are widely used as inhibitors of corrosion and rust because of their unique ability to react at the metal coating interface to inhibit corrosion, especially galvanic couple corrosion (a chemical reaction that involves electron exchange between different metals). For example, using stainless steel screws on an aluminum part provides a high potential for electron transfer (galvanic couple corrosion). Even when present in very low concentrations, chromate has the unique ability to actively suppress electron transfer at both cathodic and anodic sites when different metallic parts are in contact. Active protection against rust depends on the ability of the inhibitor to migrate to the exposed surface once the protective coating has been scratched or damaged. Inhibitors dissolve in water and migrate to the exposed surface. If the inhibitor’s solubility is too great it may be washed away, if the solubility is too low the inhibitor will have low activity. According to the literature, strontium chromate has an ideal solubility (1.06 g l^-1); zinc potassium chromate has similar solubility (0.5–1.5 g l^-1) and is a very effective inhibitor. No single nonchrome inhibitor tested thus far acts in this way.

Sicherheitsprofil

Confirmed carcinogen. Mutation data reported. When heated to decomposition it emits toxic fumes of ZnO and K2O. Used as a corrosion inhibiting pigment and in steel priming. See also CHROMIUM COMPOUNDS and ZINC COMPOUNDS.

Environmental Fate

Chromium (both trivalent and hexavalent) enters the environment from numerous natural and anthropogenic sources. The health hazards of environmental exposure depend on the oxidation state, with Cr(VI) being most toxic. Cr(VI) contamination of groundwater typically occurs from industrial sources such as electroplating or corrosion protection. Contamination of surface water is commonly the result of particulate discharges into the air from manufacturing and cooling towers, with the particulates ultimately settling to either soil or surface waters. For years, Cr(VI) was thought to arise environmentally only as an industrial pollutant but recently unpolluted ground and surface waters have been found to contain Cr(VI) in concentrations that exceed the World Health Organization limit for drinking water (50 mg l^-1).
Much of the Cr(VI) in the environment is ultimately reduced to the less toxic Cr(III). The reduction may be mediated by various reducing agents such as sulfide compounds, and divalent iron (Fe(II)). In addition, organic matter (e.g., humic acid and fulvic acid) in water or soil may mediate the reduction process. Microbial processes also convert Cr(VI) to Cr(III).

Kaliumhydroxyoctaoxodizincatdichromat(1-) Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte

Kaliumhydroxyoctaoxodizincatdichromat(1-) Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Firmenname	Telefon	E-Mail	Land	Produktkatalog	Edge Rate
Hubei Xinyang Medical Technology Co., Ltd	15347293736 15347293736	2853117764@qq.com	China	8854	58
Shaanxi Dideu Newmaterial Co., Ltd.	029-63373950 15353716720	1052@dideu.com	China	10007	58

11103-86-9(Kaliumhydroxyoctaoxodizincatdichromat(1-))Verwandte Suche:

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• potassium hydroxyoctaoxodizincatedichromate(1-)
• Zinc Potassium Chromate
• Potassium zinc chromate hydroxide (KZn2(CrO4)2(OH))
• ZINCPOTASSIUMCHROMATES
• POTASSIUM ZINC CHROMATE HYDROXIDE, as Cr
• POTASSIUMHYDROXYOCTAOXODIZINCATEDICHROMATE
• Potassium zinc chromate hydroxide
• Chromate(1-), hydroxyoctaoxodizincatedi-, potassium
• 11103-86-9
• CR2HO9ZN2K
• Inorganics