The problem of uneven surface gloss (yin and yang) on \u200b\u200bbright stainless steel pipes is primarily related to the polishing process, material handling, and environmental factors.
\nThe following are targeted solutions and precautions:
\n1. Mechanical Polishing Correction
\nRough Polishing: Use 400-1500 grit sandpaper or a belt sander to remove surface scratches and oxide layers, focusing on dark areas.
\nFine Polishing Optimization: Use a wool wheel with 0.25-1 micron diamond paste to repeatedly polish the interface between the yin and yang surfaces until the finish reaches Ra < 0.01 micron.
\n2. Electrochemical Polishing Adjustment
\nCurrent Density Control: Reduce the anodic current density to 10-30 A\/dm\u00b2 to prevent excessive corrosion on sharp corners.
\nElectrolyte Maintenance: Regularly check the concentration of the phosphoric acid-sulfuric acid mixture to prevent grayish discoloration caused by failure.
\n3. Auxiliary Pickling and Passivation
\nWeld Seam Treatment: First, pickle the weld area with a nitric acid-hydrofluoric acid mixture, then passivate to form a uniform oxide film and reduce color variation. Post-chemical polishing: Neutralize residual acid with 5% sodium hydroxide to prevent secondary oxidation.
\n4. Environment and Operating Specifications
\nDust-free operation: Polishing must be performed in a clean room to avoid dust adhesion and localized matte finish.
\nShielding device application: Install cathode shields on sharp corners to balance current distribution.
\nIf scratches exist on the surface, fill them with plaster first, then use a brushing process (straight or circular) to transition between the positive and negative surfaces. For high-quality mirror finish tubes, chemical mechanical polishing (CMP) is recommended to improve consistency.<\/p>\n","protected":false},"excerpt":{"rendered":"
The problem of uneven surface gloss (yin and yang) on \u200b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"_links":{"self":[{"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=\/wp\/v2\/posts\/431"}],"collection":[{"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=431"}],"version-history":[{"count":1,"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=\/wp\/v2\/posts\/431\/revisions"}],"predecessor-version":[{"id":432,"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=\/wp\/v2\/posts\/431\/revisions\/432"}],"wp:attachment":[{"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=431"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.juxingsteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}