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The company was a family owned business that operated since the late 1930s until 2009. [5] [6] In December 1983, a partially below-ground storage tank holding approximately 3,640 gallons of chromic acid plating solution containing approximately 5,400 pounds of chromium failed, leaking the solution directly into the groundwater underneath. [7] [1]
The most widely used anodizing specification in the US is a U.S. military spec, MIL-A-8625, which defines three types of aluminium anodizing. Type I is chromic acid anodizing, Type II is sulphuric acid anodizing, and Type III is sulphuric acid hard anodizing.
PPG Industries, Inc. is an American Fortune 500 company and global supplier of paints, coatings, and specialty materials.With headquarters in Pittsburgh, Pennsylvania, PPG operates in more than 70 countries around the globe.
Hexavalent chromium plating, also known as hex-chrome, Cr 6+, and chrome(VI) plating, uses chromium trioxide (CrO 3, also known as chromic anhydride) as the main ingredient. Hexavalent chromium plating solution is used for both decorative and hard plating, as well as bright dipping of copper alloys, chromic acid anodizing , and chromate ...
This kind of chromic acid may be used as a cleaning mixture for glass. Chromic acid may also refer to the molecular species, H 2 CrO 4 of which the trioxide is the anhydride. Chromic acid features chromium in an oxidation state of +6 (and a valence of VI or 6). It is a strong and corrosive oxidizing agent and a moderate carcinogen.
Oldcastle Materials Inc. is a supplier of asphalt, concrete, and other building materials, and also offers construction and paving services. The Atlanta-based company is a subsidiary of CRH plc, a publicly traded international group of diversified building materials businesses, [2] [3] and has approximately 18,000 employees at 1,200 locations, as of March 2018.
The Soda Industry Inc. was established in 1969 as a subsidiary of the Şişecam Group, Turkey's major glass producer. Production of soda ash (sodium carbonate, Na 2 C O 3), a key raw material for the glass industry, began in 1975.
Sigma-Aldrich was created in 1975 by the merger of Sigma Chemical Company and Aldrich Chemical Company. It grew through various acquisitions until it had over 9,600 employees and was listed on the Fortune 1000. The company has two United States headquarters, in St. Louis and Burlington, MA and has operations in approximately 40 countries. [7]