Electroplating industry in the application for a long time, but it has not dense brass ball valve coating, porosity, prone to hydrogen embrittlement, the more serious environmental pollution is serious, the high cost of dealing with waste and not eradicate, in particular, hexavalent chromium, nickel, cadmium element Harmful to the human body, is a carcinogen. Therefore, plating is a substitute for industrial development was inevitable, after years of study, we have been successful: steel, brass, aluminum, zinc-based alloy surface of the substrate, such as ion plating chromium, titanium, zirconium, aluminum, nitrogen and so on can be Zinc alternative, cadmium plating, nickel plating, chrome plating.       As early as 1980, Dalian University of Technology Professor brass ball valve Chen Baoqing Department of Materials and others on the project and the "alternative ion plating and electroplating technology-specific equipment," the State Development Planning Commission, machine-building, the city of Dalian Economic Commission, funded in 1983 ~ 1986 Appraisal has met six times, in 1985 China received patents. Patent number: 8510260011.1988 won the national years, invented a certificate numbers: A0377619, 1988 years 12 months. As of Liaoning Province and Dalian of outstanding patent, the Patent Office into China, "Chinese patent Selected projects" (P84), and State Science and Technology Commission into the "Selected Works of the People's Republic of major scientific and technological achievements" (1979 ~ 1988) (P80 ). The completion of the main pieces of steel instead of aluminum ion Zinc and cadmium plating; Ti ion, the ion in place of chrome plating nickel, chrome plating of the study.      ¢Ú 1990-1994 years      During this period, the completion of the main pieces of brass-plated stainless steel ion plating substitute palladium - ¡ú ion plating nickel alloy and titanium nitride-based zinc alloy brass ball valve plating on the surface of nickel (or chrome plating) ¡ú ion-plated titanium nitride research.      ¢Û 1995 - so far      During this period, the completion of the main pieces of brass, aluminum, zinc-based alloy layer in the middle of the ion plating alloy of nickel plating to replace ¡ú ion plating and chromium ion plating in the middle layer of nickel alloy plating alternative ¡ú ion plated titanium nitride (or zirconium) ¡ú ion plated ¡ú Ion plating transparent ceramic membrane to protect the research.      2. Brass pieces, such as vacuum ion plating alternative plating study      Brass pieces of copper - zinc alloy, molding processing performance, given its very wide application, mainly for sanitary ware, watches, metal industries, such as water, bathing equipment, watchcase and watchband, a top lock, but the brass Pieces of long-term service in poor corrosion resistance, particularly in the air, and sea-mist shower room, this piece brass plating to the surface layer of corrosion coating, the current process:      Molding processing Polishing brass ¡ú ¡ú ultrasonic cleaning chrome plating (chrome-ion) ¡ú products. Under the current process there are questions:      ¢Ù electroplating process wastes (waste gas, waste water, waste) emissions pollute the environment, it is necessary to carry out waste processing, investment and difficult to eradicate.      ¢Ú chrome plating emissions in the process of hexavalent chromium is carcinogenic substances harmful to human beings. Tags:brass ball valve brass fitting