Method for Preventing Oxidation and Discoloration of Outer Surface of Coupling Reducer Middle Layer

Method for preventing oxidation and discoloration of outer surface of Coupling Reducer CC middle layer

1. Select the volatile oil for the outer lubricating oil

The external lubricating oil is required to start to volatilize at about 300°C, and it can be completely volatilized when the annealing temperature is about 500°C, so as to minimize the residual oil on the surface of the copper pipe after annealing, so as to reduce the absorption of moisture on the surface of the copper pipe and the formation of water Possibility of membrane.

2. Strengthen the quality control of surface cleaning during layer winding

The outer surface of the layer winding is processed by in-line washing and drying. The oil residue on the outer surface of the copper pipe during the coiling is cleaned and dried as much as possible to reduce the amount of residual oil on the surface of the copper pipe after annealing, and at the same time, it can reduce the annealing cooling At times, the oil fume condenses on the inner wall of the furnace and causes the possibility of secondary pollution.

3. Strengthen the oil fume exhaust during the annealing process

By removing the oily fume volatilized from the surface of the copper pipe during the annealing process, it is avoided that the volatilized oil fume re-condenses and adheres to the surface of the copper pipe during cooling to cause pollution. It can also reduce the absorption of moisture and form a water film after the copper pipe is out of the furnace to prevent copper Oxidation of the surface discolors.

4. Strictly control the temperature of the Coupling Reducer CC coming out of the furnace

By controlling the temperature at which the Coupling Reducer CC is discharged, the chance that the middle layer Coupling Reducer CC absorbs moisture from the air before packaging after the coil is discharged, avoids the formation of a water film on the surface of the copper tube, thereby prolonging the shelf life of the copper tube and avoiding oxidation and discoloration.

5. Strengthen the protection of copper pipes after annealing out of the furnace

Cover the Coupling Reducer CC with a cover immediately after it is out of the furnace to prevent the copper tube from directly contacting the outside air before packaging, which can reduce the speed of the diffusion of external moisture into the middle layer of the coil and prevent the moisture from forming a water film on the surface of the copper tube and causing oxidation Discoloration.

6. Strengthen the management of packaging materials to ensure that the packaging materials are dry

In this regard, for new packaging materials purchased, they are controlled by formulating the humidity acceptance standards of packaging materials and accepting them according to the standards; for packaging materials that are recycled and reused, drying treatment is carried out by building a packaging material drying room. In this way, the high humidity of the packaging material can prevent the copper pipe from absorbing moisture and causing surface oxidation and discoloration during storage.

7. Improve the outer packaging of copper tubes and strengthen the sealing of the entire Coupling Reducer CC packaging .By improving the outer packaging of the copper tube, the entire Coupling Reducer CC is completely sealed to prevent the copper tube from absorbing external moisture and causing oxidation and discoloration during storage and transportation. This measure is particularly important in the protection of exported copper pipes.