Topic
Sodium dichromate
About: Sodium dichromate is a research topic. Over the lifetime, 421 publications have been published within this topic receiving 6202 citations. The topic is also known as: Disodium salt & sodium bichromate.
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09 Oct 1990TL;DR: In this article, a corrosion resistant stainless steel article is provided with a substantly uniform black oxide coating over the surface thereof, the article being formed from a steel alloy in martensitic structure which is treated in a boiling aqueous alkaline-chromate-oxidizing solution containing sodium hydroxide, sodium nitrate and sodium dichromate at a temperature in the range from about 230° F. to about 260° F for 30 to 60 minutes.
Abstract: A corrosion resistant stainless steel article is provided with a substantly uniform black oxide coating over the surface thereof, the article being formed from a steel alloy in martensitic structure which is treated in a boiling aqueous alkaline-chromate-oxidizing solution containing sodium hydroxide, sodium nitrate and sodium dichromate at a temperature in the range from about 230° F. to about 260° F. for 30 to 60 minutes.
15 citations
15 citations
TL;DR: In this paper, three experimental methods: coulometric, spectrophotometric, and atomic absorption spectrographotometry (AAS) were used to quantify the chromium content in the passive coating as total chromium, metallic chromium and chromium oxide.
Abstract: Tinplate specimens for food can applications, passivated by cathodic treatment in a sodium dichromate solution, were studied. Three experimental methods: coulometric, spectrophotometric, and atomic absorption spectrophotometry (AAS), were used to quantify the chromium content in the passive coating as total chromium, metallic chromium, and chromium oxide. Morphological and chemical analyses using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) were performed. The study was completed by conducting X-ray photoelectron spectroscopy (XPS) experiments in order to elucidate the passive layer chemical composition.
14 citations
01 Jan 1978
TL;DR: Aqueous sodium dichromate has been found to be a selective oxidant and numerous polyaromatic units, which resulted from the oxidation of a bituminous coal, have been reported.
Abstract: Aqueous sodium dichromate has been found to be a selective oxidant and numerous polyaromatic units, which resulted from the oxidation of a bituminous coal, have been reported. These products are believed to be indigenous to the coal. The effects of other oxidizing agents have been explored. Four coals and a solvent-refined coal have been subjected to oxidative degradation. Two completely abiotic samples, a synthetic Fischer-Tropsch polymer, and a polymer from the Murchison meteorite were used for comparison and to test the oxidation methods. In general, the oxidation products were carboxylic acids which were esterified by diazomethane to increase their volatility for mass spectrometry. Oxidants used were nitric acid, hydrogen peroxide, acetic acid, photochemical oxidants, and sodium hypochlorite. 4 figures, 4 tables.
14 citations
TL;DR: It is hypothesised that dissociation of apoptosis signal regulating kinase-1 from thioredoxin may be at least partially responsible for Jun N-terminal kinase activation, resulting in activation of downstream effector molecules.
14 citations