The role of anodic oxidation of vacuum electroplating electric heating tube:

The role of anodic oxidation of vacuum electroplating electric heating tube:

1. Protection

2. Decorative

3. Insulation

4. Improve the combination with organic layers.

5. Improve the bonding force with the inorganic covering layer

6. Other functions under development

The concept of anodizing of vacuum electroplating electric heating tube

The concept of anodic oxidation: the process of forming an oxide film on aluminum products (anode) under the action of applied current under the corresponding electrolyte and specific process conditions of aluminum and its alloys. Anodizing usually refers to sulfuric acid anodizing unless otherwise specified.

Pre-treatment of workpieces of vacuum electroplating electric heating tube heat treatment or welding process

Problems that need to be paid attention to in the pretreatment process of the workpiece that has undergone heat treatment or welding process: According to the process requirements, the workpiece needs to be cleaned with organic solvent before being transferred to the heat treatment or welding process to remove the surface oil, but this is generally not possible at present, so The surface of the workpiece forms a layer of oily sintered coke, which is difficult to remove in organic solvents. If it is soaked in alkaline solution, it will cause local corrosion, produce pitting or cause unevenness, which will seriously affect the product quality. Use the method of soaking in concentrated nitric acid to soften this layer of coke. After the coke is softened, it can be completely removed by a little cleaning in lye.

Pretreatment process of vacuum electroplating electric heating tube finely processed parts

Problems that need to be paid attention to in the pretreatment process of finely machined parts: Although the natural oxide film on the surface of finely machined parts is just formed and easy to remove, it is delicate and heavy, especially in and around the holes (due to the need for lubrication during machining. Such workpieces must be cleaned with organic solvents first. If they are directly washed with alkali, it will not only be greasy and difficult to remove, but also the finely machined surface cannot withstand long-term strong alkali corrosion, which will also affect the roughness of the workpiece surface. Tolerance of the fit, and ultimately become waste.

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