(1> mechanical 25.4 × 2 304 sanitary grade stainless steel tube polishing effect on the austenitic nickel chrome 25.4 × 2 304 sanitary stainless steel pipe, such as 1Cr18Ni9Ti mechanical 25.4 × 2 304 sanitary stainless steel tube polishing, Large directional pressure under the action of leveling the surface, therefore, the surface there is a certain amount of plastic deformation of the organizational characteristics – fibrous tissue, that is, Bayer layer.

(2) electrochemical 25.4 × 2 304 sanitary grade stainless steel tube polishing effect. Ma Shengli et al. Studied the electrochemical treatment of 1Cr18Ni9Ti25.4 × 2 304 sanitary stainless steel tubes in phosphoric acid / sulfuric acid system electrolytes 25.4 × 2 304 After the sanitary stainless steel tube was polished, the surface structure changed from typical fibrous tissue to uniform dense particles Grain morphology. This is clearly related to the 25.4 × 2 304 sanitary grade stainless steel tube polishing process.

Usually when the current through the electrolyte when a 25.4 × 2 304 sanitary stainless steel tube in the anode, the metal surface of the micro-bump occurred at the occurrence of preferential dissolution, and the crystal grains in different crystal surface dissolution rate is not the same, resulting in crystal The appearance of grain edge. However, the microstructure of the surface under different electrochemical 25.4 × 2 304 sanitary grade stainless steel tube is very different.

Such as in an electrolytic solution of 65% by weight phosphoric acid, 25% by weight, sulfuric acid, 10% by weight, when the anode current density is 30 A / dm2 and t is 70 ° C 25.4 x 2 304 sanitary stainless steel Polishing 1 min, you can get a better table} 25.4 × 2 304 sanitary grade stainless steel tube polishing effect.

When the anode current density (DA) is too low (Da <20A / dm2) or too large (Da> 40A / dm2, or too high (> 90 ℃) or too low (<50 ℃), or 25.4 × 2 304 (> 25min) or too short (<10min), are not conducive to the surface 25.4 × 2 304 sanitary grade stainless steel tube polishing quality improvement, such as in the DA = 20A / dm2 when the surface is corroded.