Electropolishing device for inner wall of stainless steel pipe
A technology of electrolytic polishing and stainless steel tubes, which is applied in the direction of electrolytic process and electrolytic components, can solve the problems of deteriorating air bubble outflow effect, failure to reach current density, high leakage risk, etc., and achieve good process stability and consistency, economic benefits and Good safety and compact equipment structure
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[0055] Example 1
[0056] An electrolytic polishing equipment for the inner wall of stainless steel pipes. A copper anode assembly frame 1 is provided on the upper end of the equipment. The inclination angle of the copper anode assembly frame 1 is 5-15°, and 10 to 20 can be placed at one time Products, the bottom of the copper anode assembly frame 1 is equidistantly provided with several brackets for fixing the equipment, and the copper anode assembly frame 1 is equipped with several V-shaped grooves 2, which is suitable for steel pipe products with various outer diameters. , The upper part of the V-shaped groove 2 is provided with a pressing device 3, a steel pipe 4 is provided between the copper anode assembly frame 1 and the pressing device 3, and an extension is connected to both ends of the steel pipe 4 The steel pipe 5 has the same diameter as the steel pipe 4, the length of the steel pipe 5 is 50-100 cm, and the left end of the steel pipe 5 at the left end is provided with...
Example Embodiment
[0069] Example 2
[0070] 1. Production example of 316L stainless steel pipe with an outer diameter of 12.7 mm (1 / 2 inch):
[0071] 1.1. Place 10 316L raw material steel pipes with an outer diameter of 12.7 mm and a length of 6 meters on the copper anode assembly frame at one time (the raw material pipes are bright annealed);
[0072] 1.2. The upper and lower ports of all steel pipes use the quick-twist joint assembly to connect 304 extension steel pipes with a length of 800 mm and an outer diameter of 12.7 mm. There are 10 extension steel pipes at the upper and lower ends, and the 10 extension steel pipes at the lower end are connected with the electrolyte distributor through the quick-twist joint assembly. The upper extension steel pipe extends into the collector, and the upper port is open.
[0073] 1.3. The round copper rod with a diameter of 5 mm and a length of 800 mm is selected as the cathode body. A PTFE externally threaded rod with a diameter of 3 mm and a length of 9 mm i...
Example Embodiment
[0077] Example 3: Examples of effects of products or methods
[0078] In the above embodiment 2, 10 6-meter-long 316L stainless steel pipes were electrolyzed within 30 minutes, and a series of tests were performed after completing the conventional cleaning process.
[0079] 1. The inner surface roughness of each steel pipe is measured at 3 positions at both ends and the center. Each position is measured with a Japanese Mitutoyo SJ-210 roughness meter. The measured inner surface roughness data is as follows Figure 8 Shown.
[0080] 2. Cut all the steel pipes for visual inspection. The inner walls of the steel pipes are bright electrolytically polished surfaces without any visible defects.
[0081] 3. Based on the international standard test method SEMATECH Test Method 91060573B of the semiconductor industry, the AES oxide layer thickness analysis of the steel pipe samples is carried out, and the results are as follows Picture 9 Shown.
[0082] 4. Based on the international standard tes...
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