High Phosphate Chemical Ni-p Alloy Plating Process

Chemical plating,refers to chemistry nickel plating phosphorus alloy gener ally, is uses the nickel salt and the reducing agent carries on in the identical solution from the catalyzed oxidation - electronation reaction, thus deposits the nickel phosphorus alloy coating surface treatment technology in the work piece surface. Different plates the fluid composition and the craft condition can obtain the different performance coating, The high phosphorization study nickel plating is treating plates the work piece surface to deposit the crystalless condition nickel phosphorus alloy tech- nology. Crystalless condition high phosphorus coating has the non- magnetism, the low resistance temperature coefficient (TCR), merit and so on fine corrosion resistance,the application domain is more and more widespread. The crystalless condi- tion structural material has the outstanding performance,Chemistry nickel plating achievement obtains one of non-crystalline state nickel base alloy material most economical methods, Has the widespread application in the multitudinous domain。The fluid to plate fast and contains the phosphorus quantity is the high phosphorus chemical plating fluid two important targets. But these two targets are resist in very many situations, is contradictory. The temperature is high, the plates fast is quick,in coating phosphorus content then drops;The temperature is low,the plates fast then too is slow. The PH value elevates, the plates fast increases, but contains the phosphorus quantity to reduce actually, the high phosphorus mechanism was considered generally is controls using the complexing agent plates in the fluid the Ni²⁺ release rate,Causes its release rate to slow down, By enhances in coating the phosphorus content,Will reduce like this inevitably plates fast, There fore the high phosphorus chemical plating is impossible to have very high plates fast.Present paper from technical angle, embarks from the chemical plating mechanism,through to plates the fluid component and plates the fluid craft condition to use employs two methods to achieve one goal, integrated control method, and gradually, Stratified,Penetrates gradually,Carries on the optimization with the continual orthogonal testing method, obtains optimized the craft formula. According to optimization plan, to plates the fluid the stability, the buffer capacity, the different main sal /the reducing agent mole of when different craft condition (the PH value) and so on has conducted the inspection research; To coated has carried on performance and so on degree of hardness using MH-6 type microcosmic scleromter, factor of porosity, binding force, ingredient content, microscopic structure using JXA-8800R type electron bougie and corrosion resistance with DF type tester has conducted the examination research , The result indicated this formula composition is fine。...