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Immersion zinc plating is an electroless (non-electrolytic) coating process that deposits a thin layer of zinc on a less electronegative metal, by immersion in a solution containing a zinc or zincate ions, Zn(OH) 2− 4. A typical use is plating aluminum with zinc prior to electrolytic or electroless nickel plating.
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.
Face washing, also known as facial cleanliness or face cleansing, is a form of washing in order remove dirt, germs, oil, debris, and any unwanted materials on the face, possibly with the use of soap or cleansing agent and water. These dirt or unwanted substances from cosmetic products and the environment are hardly soluble in water.
Zinc phosphate is an inorganic compound with the formula Zn 3 (PO 4) 2. This white powder is widely used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer pigment (see also red lead ).
Because electrolytically zinc-plated surfaces provide comparatively little corrosion protection, and in the case of galvanic zinc coatings on high-strength steel (e.g. category 10.9 and 12.9 high-strength bolts) there is a risk of hydrogen embrittlement, the industry needed a better corrosion protection system.
A process to apply zinc pyrithione to cotton with washable results was patented in the United States in 1984. [12] Zinc pyrithione is used to prevent microbe growth in polyester. [13] Textiles with applied zinc pyrithione protect against odor-causing microorganisms. Export of antimicrobial textiles reached US$497.4 million in 2015. [14]
George Richards Elkington (1801–1865), known for his patent for the electroplating of silver and gold (1840), had patented at least one electrochemical metal coloring process ( his procedure was further elaborated and perfected by the American J.E. Stareck 1937.
Galvanization (also spelled galvanisation) [1] is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are coated by submerging them in a bath of hot, molten zinc. [citation needed]
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