Instead of hard chrome plating ultrafine microcrystalline cobalt alloy plating technology.doc

Instead of hard chrome plating ultrafine microcrystalline cobalt alloy plating technologyOutcomes NameInstead of hard chrome plating ultrafine microcrystalline cobalt alloy plating technologyHolders of units (individuals)WenwenPatent ownedIs applying for patents for inventionsBelongs to the discipline or field ofSurface treatmentContact PersonWenwenAddressYantai Development Zone Zhujiang the 2ndExpected transformed the wayThe achievements into, mature technology and formulationsBecome Fruit Introduce IntroduceProject Description: chrome plating has excellent abrasion resistance and light performance has been widely used in the production lives. Year chrome output value of more than 10 billion yuan, of which about 20% hard chrome plating, decorative chrome accounted for 80%. Traditional chrome plating in the bath of chromic acid (hexavalent chromium), hexavalent chromium is a strong oxidant and carcinogen, can cause human renal failure, heart failure, leukemia, and may cause cancer strongly. U.S. Environmental Protection Agency (EPA), the EU WEEE and ROHS directive, our Electronic Information Products Pollution Control Management Measures expressly prohibit and control the use of hexavalent chromium plating process, and said that as long as the mature alternative technology commercialization must be eliminated hexavalent chromium plating process.The world researchers are working on instead of hexavalent chromium plating process. The current development of the trivalent chromium plating process which may be substituted Decorative hexavalent chromium electroplating process, but due to the chromium coating has excellent wear resistance, so far, be able to replace the hard chrome plating process also no commercial reported. The Na Feier tungsten alloy plating process developed Changsha excellence in 2005, has passed the achievement appraisal is a leading provider claim to replace hard chrome, but no large-scale commercialization reported. Nickel-iron-cobalt (Ni-Fe-Co.) alloy substitutes for chromium 3 plating are said to have a wear resistance twice that of chromium 3 and corrosion resistance that is 2.6 times greater. Nickel-iron-cobalt (nickel-iron-cobalt) plated chromium alloy of alternative products has the wearability twice chromium, corrosion, an increase of 2.6 times. With the appropriate nickel and iron content, a color similar to that of chromium can be obtained. Appropriate content of nickel and iron, can be similar to the color chromium. The iron and cobalt in the solution increase hardness and stability of the iron and cobalt solution to increase the hardness and stability.Friction and wear tests were performed on this particular coating using a ball-on-disc machine. This special coating for friction and wear tests with the ball - on disc machine. The Surface was observed using a Scanning Electron Microscope (SEM), and the Surface Composition Analyzed with a x-ray Analyzer. Using a scanning electron microscope (SEM), and surface composition analysis by X-ray analyzer, the surface observation. Hv hardness was determined to be 1,118 at room temperature, whereas hard chromium 3 was 900 Hv HV hardness is determined to be 1,118 room temperature, while the hard chrome 900 HVAC. Hv hardness of the Ni-Fe-Co coating did not change until the temperature reached 300C, where it went to 1,552; at 400C, it was 1,422; at 500C, it was 1,300; at 600C, it was 1,190; and at 700C, it was 1,040. deposition of Ni-Fe-Co coating hardness HV did not change until the temperature reaches 300C, where it went to 1552; 400C, it is 1422; 500C, it is 1300; 600C, it is 1190 and 700C it is 1,040.The wear rate for the Ni-Fe-Co plating was 110.56 10-17 m.sup.3 / NM (where V = lm / s, P = 600 N, T = 30 min). Nickel-iron-cobalt plating wear nautical miles (rate of 110.56 10-17 m.sup.3 / where: V = lumens / S, P = 600 N, T = 30 minutes). Of The wear rate for hard chromium was 241.11 10-17 m.sup.3 / NM 2,3. The wear hard chrome was 241.11 10-17 m.sup.3 / NM: 2,3 . Jinan Tiger Chemical Co., Ltd. developed a nickel-cobalt-iron alloys successfully applied to the continuous casting mold brass, copper plate, through steel sharp. Contain nickel, can cause skin allergies, nor the total generation of chrome plating.Massachusetts Institute of Technology 2007-2010 many reports on the development of a very small grains of nickel-tungsten alloy substitute instead of hard chrome plating, but also no large-scale commercialization. The U.S. military even hexavalent chromium hard chrome plating technology is irreplaceable.Above several studies in the nickel plating on the basis of the introduction of tungsten element, and to the introduction of the tungsten element, then will sacrifice current efficiency by more than 95% of the nickel plating, reduced to 30-40% of the plated nickel-tungsten alloy. Many of the problems brought about by the reduction of the current efficiency (such as dispersing ability to reduce serious hydrogen evolution) could be the main reason for these processes can not be large-scale commercialization.After 2 years of experimental research, the project team used a brand new method of controlling the grain size, development of a ultracrystalline cobalt alloy plating technology, process stability during operation, the current efficiency (95%), dispersed ability, covering ability, but the grain size is only for 6 to 8 nm, plated hardness can reach 700-800HV, far greater than the hardness of the tungsten alloy (about 500 Hv), close to the hardness of a hard chromium in hexavalent chromium plating (900 -1000Hv), bright, abrasion resistance and corrosion resistance can be considerable, with chrome plating and is expected to completely replace the wear resistance of the hexavalent chromium plating process for plating wear resistance coating related industries to bring major changes. The status quo under increasingly stringent environmental policies at home and abroad, this technology has a very wide range of application prospects and economic value.Scale of investment :200-50000000, technology transferTechnical advantages: electroplating additives, added to the cobalt plating solution coating hardness by 400Hv to the 900Hv, wear resistance and chrome plating quite instead of chrome plating. Relative to hexavalent chromium hard chrome plating, the following advantages: (a) energy-saving, electroplating, energy consumption is about hexavalent chromium plating was 1/3; (b) dispersing ability, coverage ability is much better than the hexavalent chromium plating ; (c) gloss and chrome close; (d) hardness, wear resistance and chromium considerable; (e) environmental protection, hexavalent chromium, the metal ions in the wastewater can be recycled. (9) ultracrystalline plated cobalt alloy tested in accordance with ASTM B117 salt spray test hexavalent chromium deposits more than the result of corrosion. Up to 1000 hours.The goal: to provide products and complete sets of technology and equipment. Plating costs slightly higher than the chrome-plated.Market prospects: With the rapid development of the market economy, the chrome plating of metal and non-metal products processing products have broad access to various industry sectors, such as aviation, machinery, electronics, chemicals, hardware, the amount and range of applications is very gratifying, very large market demand. Wear chrome decorative chromium for sanitary parts, automotive housings, piston rings, piston rod, cylinder liner, ship engines, engine rotor, bicycles, sewing machines, clocks, instruments, household hardware and other parts of the protective and decorative; for cutting and drawing tool, die and mold suppression of various materials, bearings, shaft, gauges, gear, etc., can also be used to repair worn parts dimensional tolerances.The cobalt ultracrystalline and alloy plating technology hexavalent chromium plating h