Gilded characteristics:
Appearance of the gold layer is golden yellow, with a high chemical stability, only dissolved in aqua regia, and do not dissolve in acid. The valence of gold and trivalent. The price of gold standard potential φ ° of Au / Au for 1.68V, the trivalent gold standard potential φ ° of Au3 / Au 1.50V. On steel, copper, silver and their alloy substrate, the gold plating of the cathode coating, the coating porosity affect its protective properties.
Gold layer is ductile, easily polished, high temperature, with good anti-discoloration performance. On gold-plated in silver layer can prevent the discoloration of silver; gold alloy coatings can present a variety of colors, Guchang used as a decorative coating, plating of jewelry, watches and clocks, parts, and other works of art.
Gilded with low contact resistance, good electrical properties, ease of welding, resistance, corrosion and abrasion resistance (referring to hard gold), and thus in precision instrumentation, printed circuit boards, integrated circuits, shell and tube, electrical contacts, has a wide range of applications.
Gold-plated standards:
The gold-plated quality of the pros and cons depending on the thickness of the gold layer how much, shiny and bright and dark prevail. Now prevailing in the international gold-plated jewelry standard; good gold-plated jewelry coating thickness of 10 micron, 25 micron, gold-plated jewelry coating thickness of 2 microns and 3 microns, if less than 0.18 micron coating jewelry, it can not be called “gold-plated “and referred to as the” painted gold, it is a cheap craft.
Appearance of the gold layer is golden yellow, with a high chemical stability, only dissolved in aqua regia, and do not dissolve in acid. The valence of gold and trivalent. The price of gold standard potential φ ° of Au / Au for 1.68V, the trivalent gold standard potential φ ° of Au3 / Au 1.50V. On steel, copper, silver and their alloy substrate, the gold plating of the cathode coating, the coating porosity affect its protective properties.
Gold layer is ductile, easily polished, high temperature, with good anti-discoloration performance. On gold-plated in silver layer can prevent the discoloration of silver; gold alloy coatings can present a variety of colors, Guchang used as a decorative coating, plating of jewelry, watches and clocks, parts, and other works of art.
Gilded with low contact resistance, good electrical properties, ease of welding, resistance, corrosion and abrasion resistance (referring to hard gold), and thus in precision instrumentation, printed circuit boards, integrated circuits, shell and tube, electrical contacts, has a wide range of applications.
Gold-plated standards:
The gold-plated quality of the pros and cons depending on the thickness of the gold layer how much, shiny and bright and dark prevail. Now prevailing in the international gold-plated jewelry standard; good gold-plated jewelry coating thickness of 10 micron, 25 micron, gold-plated jewelry coating thickness of 2 microns and 3 microns, if less than 0.18 micron coating jewelry, it can not be called “gold-plated “and referred to as the” painted gold, it is a cheap craft.
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