1. Process sequence planning
To achieve the coordinated operation of stainless steel Sandblasting and chemical etching process, the process sequence must be carefully planned first. Usually, Sandblasting process can be used as a pre-process. Sandblasting treatment is carried out on the surface of stainless steel, and sand particles are used to impact the surface at high speed, which can make the stainless steel surface have a certain degree of roughness, remove impurities such as oil and scale on the surface, and create a good foundation for chemical etching.
The microstructure of the stainless steel surface after Sandblasting treatment is more conducive to the adhesion and reaction of chemical etching solution. After Sandblasting, chemical etching should be carried out as soon as possible to avoid the surface after Sandblasting from being contaminated or oxidized again. After chemical etching, it can be decided whether to perform Sandblasting again according to actual needs. If it is necessary to adjust the surface texture or further remove some microscopic defects generated during etching, secondary Sandblasting can play a good effect.
2. Parameter matching and optimization
Sandblasting and chemical etching processes have their own key parameters, which need to be matched and optimized when working together. In the Sandblasting process, sand particle size, Sandblasting pressure and Sandblasting time are important parameters. For stainless steel that will be chemically etched later, moderate sand particles (such as 80-120 mesh) can be selected, the Sandblasting pressure is controlled at 0.3-0.5MPa, and the Sandblasting time is determined according to the size and surface requirements of the stainless steel, generally 30-60 seconds.
The parameters of chemical etching, such as the composition, concentration, etching temperature and etching time of the etching solution, also need to be adjusted according to the surface state of the stainless steel after Sandblasting. For example, for surfaces with greater roughness after Sandblasting, the etching solution concentration can be appropriately increased, the etching temperature can be controlled at 50-60℃, and the etching time is determined according to the required etching depth. By reasonably adjusting the parameters, the two processes can cooperate with each other to achieve the ideal surface treatment effect.
3. Etching solution selection and Sandblasting post-treatment
The selection of etching solution is crucial for collaborative operation. For the stainless steel surface after Sandblasting, an etching solution that is suitable for the surface state and the target etching effect should be selected. If the stainless steel surface after Sandblasting contains trace amounts of residual sand, some complexing agents can be added to the etching solution to dissolve and remove these impurities to prevent them from affecting the etching quality.
After Sandblasting and before etching, the stainless steel surface needs to be properly treated. For example, a thorough cleaning is performed to remove the sand and oil residues remaining on the surface during the Sandblasting process. After cleaning, a drying treatment can be performed to ensure that the surface is dry and free of moisture to avoid diluting the etching solution or causing uneven local etching. At the same time, the surface can be activated, such as using an acidic activator to increase the reactivity of the surface and make the etching process more uniform and efficient.
4. Quality control and process connection
In the collaborative operation process, quality control is the key. It is necessary to establish a complete quality inspection system, detect the surface roughness and cleanliness after Sandblasting, and monitor the etching depth and etching accuracy after chemical etching. For quality problems that arise, such as uneven etching and excessive Sandblasting, the causes should be analyzed in a timely manner and the process should be adjusted.
In terms of process connection, during the conversion process between Sandblasting and chemical etching, the state of the stainless steel surface should be ensured to be stable. The layout of the equipment should be reasonable to reduce the transportation time and possible contamination of stainless steel during process conversion. At the same time, the operators should be proficient in the key points of the two processes to ensure a smooth transition of the processes, so as to achieve high-quality stainless steel surface treatment effects.
