From the angle of height difference of the maximum height of the cross-sectional line profile in the range of 9.96 m, the effect of KOH sleek system is most obvious, after treatment by KOH sleek system, the Pt value range decreased significantly, the pt value of sample b decreased by 67.1%, the increase reaction processing time, Pt is larger, mainly because pt value has a certain randomness. But regardless of the system, the Pt value has dropped overall, indicating that the suede does become more uniform and consistent after smooth treatment, which can also be reflected in the scanning mirror. According to the angle of maximum reduction ratio: the maximum decrease of copper-iron sleek system was 7.7%, and the maximum decrease of the ultrasonic treatment method Pt was 17.4%, which shows that KOH etching is the best effect.
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