The hydraulic cylinder axis plating chrome plating of the nickel(电镀镍钴铁).docVIP

The hydraulic cylinder axis plating chrome plating of the nickel-iron-cobalt-generation Hydraulic cylinder hydraulic system actuators, used to perform a reciprocating motion, widely used in construction machinery. The piston rod of the hydraulic cylinder is an important part of the hydraulic cylinder, it is usually a 35,34 number or seamless steel pipe made of a solid rod or hollow rod, in order to progress in the wear resistance of the anti-rust, domestic traditional craft surface hard chromium plating (plating thickness of 0.02 ~ 0.05mm) and polishing, the surface roughness Ra was 1.6 to 0.4 μm. Chrome plating on the people, and serious environmental pollution, is the value of the State Environmental Protection line project and uneven coating, high porosity, easily peeling chrome expense is relatively high, can not meet the needs of production, and therefore suitable economic plating replace chrome plating has been an important issue in the construction machinery industry. Hydraulic cylinder shaft nickel-cobalt-iron on behalf of chromium technology and process characteristics ????The technology is efficient and clean surface treatment technology process, low energy consumption, no electroplating sludge to achieve zero discharge of wastewater. The basis of research results, and has been successfully achieved industrialization of nickel-cobalt-iron on behalf of the chromium surface engineering technology. The whole process is divided into pre-plated, plating nickel-cobalt-iron and plated processing of three parts, the process is as follows: ? The major processes briefing as follows: (1) ,7-10A / dm2 of the electrolytic degreasing 1:15 minutes to remove the remaining stain of the surface of the workpiece so that the surface purification. (2) hot water washing: 55 ℃ hot except saponified film, the wash water can be long-term use. (3) electrolytic degreasing 2: 1-3 minutes ,7-10 A/dm2 activation matrix. (4) cold wash: room temperature, purifying the surface of the bas