When using nickel chemical precipitation to improve corrosion resistance and wear resistance, as the intermediate surface in a multi-layer metal system of aluminum rods or as a high-gloss decorative surface of aluminum rods, this process involves several parameter variables. What distinguishes this process from other processes is phosphorus, heat treatment and the use of dispersions and whether they precipitate with other metals. Nickel chemical plating is mainly used in engineering applications. Nickel alloys are deposited on aluminum rods in acidic solutions or alkaline solutions of nickel salts. Boron hydroxide is used as a reducing agent in alkaline processes and hypophosphite is used as a reducing agent in acidic processes. An important precipitation effect of this chemical method is that the nickel coating after precipitation is very hard and has good corrosion resistance and wear resistance, which greatly improves the effect of chemical precipitation.
A major feature of aluminum as a metal is that it easily reacts with air at room temperature to form a dense oxide film on its surface. The same goes for aluminum rods as aluminum products. The oxidation after chemical precipitation is different. Only after special heat treatment can this oxide film be well combined with the matrix. The steps for aluminum rod pretreatment are as follows: acid activation, cathodic process, impregnation, matchmaking pool and layer.
Pretreatment of chemically treated aluminum rods can alter the properties of the surface coating. The internal stress is released around 200, and the hardness is strengthened at 280 or 600, while also enhancing the wear resistance. If desired, coatings with different properties can be deposited. The water resistance of these aluminum rod coatings is enhanced when automatically controlled air conditioners heat transfer the subsequent dispersion layer providing a choice between hard tempered coatings and hard anodized coatings.
Aluminum rods combined with gold dot plating enhance electrical performance and bonding. Nickel coatings can be formed by further chemical reactions, providing they can be deposited in a second layer.
