Degreased copper tube customized, degreased copper tube manufacturer, degreased copper tube: After degreasing and degreasing processing of copper tube. Copper tube degreasing method of grease, descaling, phosphating, passivation comprehensive treatment of selecting the appropriate solution components, so that the workpiece coating before the degreasing, descaling, phosphating, passivation of the four processes, or three of them, two processes in the same tank to complete the process, usually this comprehensive treatment process accordingly referred to as the "four in one", "Three in one" and 'two in one'. The use of this integrated treatment process, you can simplify the process, reduce the operating area, save equipment costs, shorten the working hours, improve labor productivity, reduce costs, this method can only be used for painting quality requirements are not high occasions. However, in actual production, due to the oil content of more or less, light or heavy corrosion, the solution of the components of the consumption of different speeds, need to pay attention to the adjustment and control, in order to maintain the role of the due.
First, the "two-in-one" treatment process (1) degreasing and descaling "two-in-one" degreasing and descaling "two-in-one" solution by the components that can remove oil and can remove rust components together. Components of the principle of action of a separate degreasing agent, rust remover, the same two degreasing rust "two in one" is a comprehensive treatment process in the application of the zui wide and to obtain a high quality. Examples of formulations are shown in Table 1. (2) degreasing and phosphating "two-in-one" degreasing and phosphating "two-in-one" solution by the components that can remove oil and dirt and can make the surface of the steel to generate a phosphating film composed of components. The role of each component is the same as separate degreasing agent, phosphating agent. The formula and process conditions are as follows: dihydrogen phosphate according to 85 parts (powder) 15 parts of sodium phosphate (powder) surfactant (low-foaming nonionic) 5 parts (liquid) will be dissolved in water, diluted to pH value of 5.5-6, the total acidity of 5-7 "point". Phosphating by spraying method, treatment temperature of 60-70 ℃, time 2min, the phosphating film obtained about 0.3-0.5g/m2. (3) Descaling and phosphating "two in one" descaling and phosphating "two in one" solution consists of components that can remove rust and components that can generate a phosphating film on the surface of the steel and iron. The surface of the steel to generate a phosphating film composition. The role of each component is the same as the separate rust remover and phosphating agent. Examples of formulas are shown in Table 2. 2, "three-in-one" treatment process time 2-3min for the treatment of thin oil and light rust of the workpiece. Three, "four in one" treatment process degreasing rust phosphating passivation "four in one"
The treatment solution contains degreasing component, descaling component, phosphating component and passivation component. It is suitable for the removal of thin liquid oil and light rust and the generation of a certain corrosion-resistant phosphating film. Examples of formulations and operating conditions are shown in Table 3. Table 3 Degreasing, descaling, phosphating, passivation, "four-in-one" formula and process conditions of the preparation of the solution to the formula 1 as an example: the calculated amount of zinc oxide into a paste with water, slowly under stirring add the calculated amount of phosphoric acid until * dissolved, and then add zinc nitrate, tartaric acid, diluted with water to the total volume of 2 / 3. Add zinc nitrate, tartaric acid, water to the total volume of 2/3. Add sodium alkyl sulfonate, OP emulsion, stirring to make it * dissolved. Then add chromium dihydrogen phosphate dissolved in dilute phosphoric acid, and then add titanium sulfate. After all the materials are added, dilute to the total volume, stir to make the solution homogeneous, cold to room temperature, the solution is put in a large number of iron filings, impregnated for 2-3 days, so that it contains a sufficient amount of ferrous ions. When the content of ferrous ions reaches 7g/L or more, adjust the free acidity and total acidity of the solution to the specified values, then it can be warmed up and used. When ferrous ion reaches the aforementioned value, the phosphating speed is fast, the solution is stable, and the phosphating film is crystalline and fine. Operation should pay attention to control the temperature, the temperature is higher than 70 ℃, nitrate is easy to react. Heater should be installed in the tank walls, not installed in the bottom of the tank to prevent local overheating. The heater should be made of stainless steel pipe or iron pipe, do not use lead pipe or copper pipe, so as to avoid the solution being contaminated by impurities.
