Stainless Steel Pipe Surface Treatment Methods
Stainless Steel Tube Pickling & Passivation Surface Treatment Methods
1. Pickling & Passivation
Process Principle: Use acidic solutions such as nitric acid + hydrofluoric acid to remove scale, weld marks, oil stains and other impurities on the stainless steel surface, and then form a dense chromium passivation film (Cr₂O₃) through passivation treatment
Treatment Effect: Eliminate surface defects and significantly improve corrosion resistance; the surface shows a uniform matte silver-gray color without reflection
Application Field: Basic anti-corrosion pretreatment for industrial pipelines, chemical equipment and fluid transportation pipelines
Stainless Steel Pipe Mechanical Polishing Surface Treatment Methods
2. Mechanical Polishing
Process Principle: Use tools such as grinding wheels, polishing wheels and abrasive belts to conduct physical grinding in three stages: rough polishing, medium polishing and fine polishing
Treatment Effect: Extremely high surface finish (up to Ra0.2μm or below), showing mirror or semi-mirror texture, delicate and smooth
Application Field: Decorative pipes, food hygiene-grade pipes, medical device pipes
Stainless Steel Pipe Chemical Polishing Surface Treatment Methods
3. Chemical Polishing
Process Principle: Use the corrosive effect of chemical polishing solution to dissolve the micro-protrusions on the stainless steel surface to achieve surface leveling and brightening
Treatment Effect: Uniform and bright surface, lower processing cost than mechanical polishing, suitable for batch processing of complex pipe fittings
Application Field: Surface beautification of special-shaped pipe fittings and large-batch industrial pipes
Stainless Steel Pipe Electrolytic Polishing Surface Treatment Methods
4. Electrolytic Polishing
Process Principle: Use stainless steel pipe as anode, energize it in electrolyte, and achieve high-precision surface leveling through electrochemical dissolution
Treatment Effect: Higher finish than chemical polishing, while strengthening the passivation film, stronger corrosion resistance, no residual scratches from mechanical polishing
Application Field: High-end food and beverage pipelines, pharmaceutical equipment pipelines, precision instrument pipes
Stainless Steel Tube Sandblasting Surface Treatment Methods
5. Sandblasting Treatment
Process Principle: Use high-pressure airflow to spray abrasives such as quartz sand and emery onto the stainless steel surface, forming a uniform rough surface through impact
Treatment Effect: The surface has a matte frosted texture, eliminates reflection, covers slight scratches, and enhances coating adhesion
Application Field: Home kitchen and bathroom pipes, furniture decorative pipes, elevator handrail pipes
Stainless Steel Tube Brushing Surface Treatment Methods
6. Brushing Treatment (Hairline Treatment)
Process Principle: Use abrasive belts or wire drawing machines to rub along the axial direction of stainless steel pipes to form uniform linear textures
Treatment Effect: The surface has a delicate hairline texture, which combines decoration and wear resistance, is not easy to leave fingerprints, and is easy to clean
Application Field: Home kitchen and bathroom pipes, furniture decorative pipes, elevator handrail pipes
Stainless Steel Tube Electroplating Surface Treatment Methods
7. Electroplating Treatment
Process Principle: Use electrochemical methods to plate metal layers such as chromium, nickel and titanium gold on the stainless steel surface
Treatment Effect: Improve surface hardness and wear resistance, optimize aesthetics, and can present metallic luster such as gold and silver
Application Field: High-end decorative pipes, bathroom hardware pipe fittings, luxury packaging pipes
Stainless Steel Tube Coloring Surface Treatment Methods
8. Coloring Treatment
Process Principle: Use chemical oxidation or electrolytic oxidation processes to form a colored oxide film on the stainless steel surface, and the color can be customized (blue, green, red, black, etc.)
Treatment Effect: The colored appearance is decorative, the oxide film has certain corrosion resistance, and the color is durable and does not fade
Application Field: Building decoration, art products, outdoor landscape pipes
Stainless Steel Tube Film Coating Surface Treatment Methods
9. Film Coating Treatment
Process Principle: Apply PE protective film on the surface of stainless steel pipes to isolate external friction and stains
Treatment Effect: Temporarily protect surface finish, can choose protective films of different thicknesses as needed, and tear off directly when in use
Application Field: Transportation and storage protection for all precision-processed stainless steel pipes
MAYER Stainless Steel Tube and Fitting Manufacturer
