Electropolished Stainless Grade 2205 Pipe
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What is Electrolytic Polishing 2205 Stainless Steel Pipe?
Electrolytic Polishing 2205 Stainless Steel Pipe (UNS S32205/S31803, EN 1.4462, ASTM F51/A790) is a high-performance duplex stainless steel pipe that undergoes a precision electrolytic polishing process. This process dissolves surface irregularities through anodic electrolysis, resulting in a mirror-like smooth, ultra-clean surface (Ra ≤0.2μm, typical values range from 0.05-0.15μm). The process also forms a 15-30% thicker passivation oxide film, enhancing corrosion resistance (pitting resistance in 3.5% NaCl solution increases by 3-5 times, with a PREN value maintained at 32-36).
GNEE's Electrolytic Polished 2205 Stainless Steel Pipes:
GNEE supplies both seamless and welded Electrolytic Polished 2205 stainless steel pipes, with standard lengths of 6m/12m or customized lengths (minimum 0.5m) available upon request. The controlled electrolytic polishing process follows the parameters:
Temperature: 40-60°C
Current Density: 100-200 A/dm²
Processing Time: 5-15 minutes
Electrolyte: Phosphoric-sulfuric acid solution
After polishing, the pipes undergo thorough deionized water rinsing and passivation treatment to ensure iron content is ≤50 mg/m² and that no residual electrolyte remains.
Electrolytic Polished 2205 Stainless Steel Chemical Composition (Weight %)
| Element | Content Range |
|---|---|
| Chromium (Cr) | 22.0 - 23.0% |
| Nickel (Ni) | 4.5 - 6.0% |
| Molybdenum (Mo) | 3.0 - 3.5% |
| Carbon (C) | ≤ 0.03% |
| Manganese (Mn) | ≤ 2.0% |
| Phosphorus (P) | ≤ 0.035% |
| Sulfur (S) | ≤ 0.015% |
| Iron (Fe) | Balance |
| Nitrogen (N) | 0.08 - 0.20% |
Electrolytic Polished 2205 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 620 - 880 MPa |
| Yield Strength | 450 - 600 MPa |
| Elongation | ≥ 25% |
| Hardness (Brinell) | ≤ 290 HB |
| Impact Toughness | ≥ 60 J at 20°C |
| Modulus of Elasticity | 200 GPa |
| Pitting Resistance Equivalent Number (PREN) | 32 - 36 |
Electrolytic Polished 2205 pipe Key Advantages:
Reduced Fluid Friction: Flow efficiency increases by approximately 20%.
Surface Defect Elimination: Micro-cracks and inclusions are removed, enhancing durability.
Easier to Clean: Biofilm attachment rate is 50% lower compared to acid-etched surfaces.
Extended Service Life in Harsh Environments: The working temperature range is from -40°C to 300°C, making it suitable for extreme conditions.
Applications:
Electrolytic polished 2205 stainless steel pipes are ideal for use in:
Pharmaceutical/Biopharmaceutical Process Systems
High-Purity Chemical Transport
Food & Beverage Processing
Semiconductor Manufacturing
Offshore Oil & Gas (Subsea Umbilical Pipes)
Seawater Desalination Reverse Osmosis Membranes
Medical Devices
GNEE provides full traceability, including factory test certificates (MTC), optional 3.1/3.2 inspection documents, and customized packaging (anti-static bags for high-purity applications).
Minimum Order Quantity (MOQ): 50 kg
Lead Time for Standard Sizes: 10-20 days
