Tarnish inhibitors

Uses. Most of the melamine produced is used ia the form of melamiae—formaldehyde resias (see Amino resins and plastics). Other appHcations (63) iaclude the use of melamine pyrophosphate [15541 -60-3] ia fire retardant textile finishes, chloriaated melamine as a bactericide, and melamine as a tarnish inhibitor in detergent compositions, in papermaking, and manufacture of adhesives. 

Cobratec [PMC], TM for corrosion, staining, and tarnish inhibitors for copper and brass. 

Technetium is a silvery-gray metal that tarnishes slowly in moist air. The common oxidation states of technetium are +7, +5, and +4. Under oxidizing conditions technetium (Vll) will exist as the pertechnetate ion, TcOr-. The chemistry of technetium is said to be similar to that of rhenium. Technetium dissolves in nitric acid, aqua regia, and cone, sulfuric acid, but is not soluble in hydrochloric acid of any strength. The element is a remarkable corrosion inhibitor for steel. The metal is an excellent superconductor at IIK and below. 

A problem associated with the use of abrasive metal poHshes is that the fresh metal, which has been exposed by the cleaning, rapidly oxidizes or tarnishes. Thus, many modem poHshes contain inhibitors. Sulfur compounds, eg, alkyl benzyl thiols, commonly are used, as are mercapto esters such as lauryl thioglycolate [3746-39-2] and dialkyldisulfides (52—54). 

Corrosion Inhibitors. Steel-reinforcing wire and rods embedded in concrete containing quinoline or quinoline chromate are less susceptible to corrosion (72) (see Corrosion and corrosion control). Treating the surface of metals with 8-hydroxyquinoline [148-24-3] makes them resistant to tarnishing and corrosion (73). Ethylene glycol-type antifreeze may contain quinoline, 2-chloro-, 4-amino-, 8-nitro-, or 8-hydroxyquinoline to prevent corrosion (74). 

The atmospheric pollution prevailing in special industrial or laboratory locations may induce more severe corrosion, e.g. the vapours from concentrated hydrochloric or acetic acid will etch tin, and moist sulphur dioxide will produce a sulphide tarnish, as will hydrogen sulphide at temperatures above about 100°C. The halogens attack tin readily. The commonly used volatile corrosion inhibitors are without adverse action although the benefit derived from their use is doubtful. 

Mercaptoethanol (2-ME) is used as an initiator for polymeric reactions a reagent for diagnostic bioassays a rust inhibitor for steel a brightening agent in copper deposition a tarnish remover for alloys and metals an ingredient in hair permanent chemicals, and in hair and wool dyes a stabilizer and a mosquito control agent. 

Uses Polymerization conditioner intermediate in organic synthesis synthetic rubber processing surfactant corrosion inhibitor in tarnish-preventing agents Manuf./Distrib. Aceto http //www.aceto.com... 

Uses Detergent, corrosion inhibitor, foam booster/stabilizer, wetting agent, lubricant, emulsifier for dentifrices, personal care, household cleaners, pharmaceuticals, metal processing/finishing, metalworking and cutting oils Features Will not tarnish copper contains no diluents easy to handle... 

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