Study Of Amorphous Cr-Fe-C Alloy Deposits

The composition of amorphous Cr-C deposit is even, and the structure is even, so the deposit has better function than the traditional chromium and is paid more attention. The micro rigidity and the wearable resistance of amorphous Cr-C are all obviously higher than that of traditional chromium deposit, especially the micro rigidity goes up with the temperature rising within the scope of certain temperature degree, which can amount to the 1800 HV or so, hoping to become the valid processing method of wearable and corrosion parts under the heat environment bear. In addition, plating with the traditional hexed chromes qua the one of all plating that results in serious pollution for the human body and the environments, so it has already been forbidden in the developed countries such as USA and Japan. With the increasing environment protection wariness, it will finally be eliminated in our country. In order to replace heavy polluting hexed chromes plating, we turn to trivalent chromes, which is the crafts that has the most development foreground currently. The poison of the Cr³⁺ ion is only 1% that of the Cr⁶⁺ ion, as a result it get the people's extensive attention.The composition of amorphous Cr-Fe-C alloy deposit is made with the liquid that adopts mainly Cr³⁺ ion. Through a great deal of experimentation, we respectively choose the sulfuric acid chrome and the sulfuric acid ammonia as the primary salt and electric salt, (NH₄)₂C₂O₄ as complexing agents, and choose the SuS₃O₄ steel( namely 0Cr₁₈Ni₉) as the anode material, for near to the engineering practice. In addition we choose the representative 4Cr₁₀Si₂Mo steel (rooting in the drain tap of gas engine) as cathode, through changing the content, current density and electroplated time of complexing agents , amorphous chromium deposit of different thickness is plated on the cathode.Chromium deposit made through the above-mentioned craft, is measured...