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The chromate coating acts as paint does, protecting the zinc from white corrosion, thus making the part considerably more durable, depending on the chromate layer's thickness. [8] [9] [10] The protective effect of chromate coatings on zinc is indicated by color, progressing from clear/blue to yellow, gold, olive drab and black.
This process is done by putting zinc or a zinc plated metal in a solution of sodium dichromate and sulfuric acid for a few seconds. [6] Zinc chromate can also be synthesized by using neutral potassium chromate (K 2 CrO 4) and zinc sulfate (ZnSO 4), which forms a precipitate. [7] K 2 CrO 4 + ZnSO 4 → ZnCrO 4 + K 2 SO 4
Primer reduces the number of paint coats needed for good coverage and even color. A thin layer of paint may still be permeable to water. Water can permeate into the wood and cause warping, mildew, or dry rot. Primer improves the waterproofing of the finish. [4] Primers are not used as part of a wood stain treatment because they obscure the wood ...
An anodized oxide layer has a thickness in the range of 30 nanometers (1.2 × 10 −6 in) to several micrometers. [20] Standards for titanium anodizing are given by AMS 2487 and AMS 2488. AMS 2488 Type III anodizing of titanium generates an array of different colors without dyes, for which it is sometimes used in art, costume jewellery , body ...
A Kentucky man is accused of murdering a 18-month-old child he had been watching after the child suffered several serious injuries. Police in Elizabethtown, Ky., say that Terrance Corbin, 20, was ...
The Brisk It Origin 580 is a pellet smoker, designed for cooking at low temperatures for long periods of time. It has a temperature range of 165 to 500°F, and unlike gas or charcoal grills, you ...