Study Of Process Of Iron Electroplating Without Pre-Etching & Compound Electronplating

Based on analysis and compare of kinds of iron electroplating methods, a new process of iron electroplating without pre-etching and composite electroplating has been brought forward for restoring.Iron electroplating without pre-etching refers to: first, removing the grease and rust before experiments; second, use asymmetry AC-DC electroplating, change the current from asymmetry AC to DC. According to the need of iron electroplating without pre-etching, asymmetry AC-DC supply has been used in experiments. By a series of experiments in choosing parameters, the influence factors on surface, Metallographs structure, thickness, hardness and well-proportioned distribution of electroplating layer, such as thickness, temperature, pH indicator of electroplating solution and The area ratio of cathode to anode, current density and time. Based on a number of process experiments, the process parameters of iron electroplating without pre-etching were optimized. The surface morphology and the microstructure and property of the electroplating layers were observed and analyzed by optical microscope, micro-hardness tester and so on. The basic fundamentals of the electroplating layer formation on joint strength and hard mechanism are discussed. Electroplating layer made by iron electroplating without pre-etching in low temperature, having advantage as following: low temperature in electroplating; high joint strength with matrix; quick deposition velocity; the well-proportioned thickness of electroplating layer; high hardness; well wear resistance; low cost; no pollution and so on. This process can be widely used for restore and intensify accessories.In order to improve wear resistance, hardness, we study more Fe metal matrix composite. By suspending some indiscerptible solid particles (SiC) in electroplating...