DIN/EN black phopshated precision seamless steel tubes Black phosphated on both sides of pipe. The phosphated coating is Delicate, high lubricity, uniform color. Good looking in appearance High anti corrosion & anti rust. Suitable for painting, and have strong adhesion
Phosphated Precision Seamless Steel Tube
DIN 2391 Phosphated Precision Seamless Steel Tube Product name: DIN 2391 phosphating precision seamless steel pipe Standard: EN10305-4 (DIN2445/2), EN10305-1 (DIN2391), ASTM A179 Steel grade: E235 (ST35 ST37.4), E355 (ST52 ST52.4) Size: OD: 4-120mm, WT: 0.5-10mm, Length: fixed 6m or as your request Surface Treatment: Phosphating–External Phosphating Coating Delivery condition: +N (NBK) normalized under a controlled atmosphere Delivery time: 15-45 days, according ... Read more
  • 1. What is Phosphated Tube?

    A Phosphated tube is a type of steel pipe that has been treated with phosphate. This is a type of surface treatment, in which metal surfaces are coated with phosphate conversion coatings.
  • 2. How long does a Phosphated Tube last?

  • The life of a phosphate tube is dependent on a number of factors including the type of coating applied, the material and size of the tube and its application. A typical service life for a phosphated tube in an industrial application is between 12-24 months.
  • 3. What are the advantages and disadvantages of a Phosphated Tube?

    • The advantages of a phosphated tube are:
    • – The corrosion resistance is better than that of unphosphated tubes.
    • – Corrosion resistance is better with the addition of zinc to the steel during the rolling process.
    • – The mechanical properties of phosphated tubes are generally better than those of unphosphated tubes.
    • Disadvantages of Phosphated Tube
    • The disadvantages of phosphating are:
    • – Phosphating may not be suitable for all grades of carbon steel, especially if they contain high amounts of sulphur or phosphorus. Excessive exposure to phosphating solution will cause surface accumulation and pitting corrosion at low pH levels.


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