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Both quantitative and qualitative tests for solderability exist. [6] The two most common testing methods are the 'dip and look' method and wetting balance analysis.In both of these tests, the soldered pieces undergo an accelerated aging process before being tested for solderability, to take into consideration the time a component was in storage prior to mounting to final assembly.
Porosity results are determined by the distribution, number and sizes of dark spots on the materials under test. Again, the dark spots are due to reaction of the moist sulfur vapors with the underlying silver or copper material. One may choose to include silver or both silver and copper reference coupons into the humid sulfur test.
Electroplating of acid gold on underlying copper- or nickel-plated circuits reduces contact resistance as well as surface hardness. Copper-plated areas of mild steel act as a mask if case-hardening of such areas are not desired. Tin-plated steel is chromium-plated to prevent dulling of the surface due to oxidation of tin.
Western concert flutes are usually plated with or made out of sterling silver; [113] in fact, most silverware is only silver-plated rather than made out of pure silver; the silver is normally put in place by electroplating. Silver-plated glass (as opposed to metal) is used for mirrors, vacuum flasks, and Christmas tree decorations. [114]
Rhodium-plated on silver-plated copper: −0.05 Silver, solid or plated; monel metal; high nickel-copper alloys: −0.15 Nickel, solid or plated; titanium and its alloys; monel: −0.30 Copper, solid or plated; low brasses or bronzes; silver solder; German silvery high copper-nickel alloys; nickel-chromium alloys: −0.35 Brass and bronzes: −0.40
Gold and silver are both precious metal assets worth investing in, but one could be a better bet right now. / Credit: Getty Images/iStockphoto Until recently, inflation had been high in the U.S.
Immersion silver plating (or IAg plating) is a surface plating process that creates a thin layer of silver over copper objects. It consists in dipping the object briefly into a solution containing silver ions.
Gold vs. silver: Speculative uses. The demand for gold and silver comes from different sources, with gold primarily an investment asset and silver an industrial one.
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