Optimizing Electroless Nickel Pretreatment Processes
نویسنده
چکیده
The pretreatment of the substrate, prior to Electroless Nickel (EN) plating, plays an important role in the corrosion protection provided by the EN deposit. Many factors in the pretreatment process can affect the corrosion resistance of the EN deposit. The details of mechanical treatment, chemical/elecuo polishing, acid activation, and pre-processing procedure (such as nickel strike) are among the most important. 8y use of Taguchi statistical methods, the effects of different pretreatment procedures in EN plating have been experimentally investigated. A lot of information has been obtained from the investigations and pretreatment processes have been optimized. The Neural Network system has been found to be a vey good method for predicting the corrosion resistance of an EN deposit.
منابع مشابه
Effects of Pretreatment on the Structure and Properties of Electroless Nickel Coatings
m e pretreatment process can significantly affect the corrosion resistance of Electroless Nickel (EN) coatings. One of the most important reasons is that different pretreatment processes can give different surface morphologies of the substrate. The Sanning Electronic Microscope (SEM) and the Scanning Tunneling Microscope (STM) have been used to investigate the structure and properties of EN coa...
متن کاملPretreatment Effect on the Properties of Electroless Nano - Crystalline Nickel Phosphorous Coating
the influence of mechanical polishing pre-treatments on steel substrates is investigated in terms of microstructure, deposition rate, adhesion, mechanical and corrosion properties of electroless Ni-P nanocoating with 9-10% wt. of P content. XRD analysis of Ni-P coatings demonstrated the nanocrystalline structure of coating with the grain size of 39 nm. Results showed that pretreatment of substr...
متن کاملBath and Deposit Monitoring System for Electroless Nickel Plating Process
Electroless nickel plating is a widely used plating method in many industries. The usability of the coating is, however, restricted by the control problems related to the electroless nickel plating process. To ensure deposit quality, the transcendent properties of electroless nickel deposit should be accurately controlled during plating, which is challenging because of the spontaneous, unstable...
متن کاملENVIOLET the State-of-the-Art Technology for “Electroless Nickel” Wastewater Treatment
Very often electroless electrolytes contribute to wastewater treatment problems. These electrolytes are used in electroless plating processes, which contain a variety of chemicals to meet special surface treatment requirements. Metal salts produce the base material for metal deposition and hypophosphite is delivering the electrons for the metal reduction process – it is basically the internal e...
متن کاملCharacterization of electroless nickel plating on aluminum mirrors
Electroless nickel is often plated on the surface of aluminum mirrors to improve the ability to polish the mirror surface. Electroless nickel plating can cause a bimetallic effect, creating distortion of a mirror surface if it is heated or cooled. Published data listing the thermal coefficient of expansion and Young’s modulus as a function of temperature for electroless nickel is not readily av...
متن کامل