ã€China Aluminum Network】Choose what kind of solution will be used to brush the bottom layer, which will directly affect the quality of the coating. According to different substrates, select the appropriate solution. Special nickel has a very high bond strength to most of the metals on the substrate. It is commonly used on substrates such as steel, iron, copper, chromium, and stainless steel. For a substrate with a relatively high hardness, a low-stress solution should be selected. For materials such as cast aluminum and cast aluminum alloys, the materials are relatively loose and the porosity is relatively high. It is not appropriate to use a solution with strong acidity to brush the substrate, and the alkaline copper solution is selected for comparison. Suitable for. The specific process flow is as follows:
1) Electrolytic degreasing with 2# electrocleaning to remove oil.
2) Rinse with tap water.
3) activation with 1 # activation liquid, reverse, l0 ~ 15V, the amount of electricity is 0.7 ~ 1A h / dm2.
4) Rinse with water.
5) Basic copper bottoming. Positive. 6 ~ 8V, 1 ~ 2μm.
6) Rinse with tap water.
7) Brush the working layer.
Ferrosilicon is an iron alloy composed of iron and silicon. Ferrosilicon is an iron-silicon alloy made from coke, steel shavings, quartz (or silica) and smelted in an electric furnace. Since silicon and oxygen can be easily synthesized into silica, ferrosilicon is often used as a deoxidizer in steelmaking, and since SiO2 generates a large amount of heat during deoxidization, it is also advantageous to increase the temperature of molten steel. At the same time, ferrosilicon can also be used as an alloying element additive, widely used in low-alloy structural steels, spring steels, bearing steels, heat-resistant steels, and electrical silicon steels. Ferrosilicon is often used as a reducing agent in ferroalloy production and chemical industries.
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