Our E-Coated Steel Pipes are treated with electro-coating (E-coating) to provide excellent corrosion resistance and a uniform black finish.These pipes are ideal for applications where durability, corrosion protection, and appearance are critical. The electro-coating process ensures that the coating penetrates crevices and internal surfaces, offering full protection compared to traditional surface coatings.
Applications include:
·Automotive structural components
·Construction and infrastructure projects
·Industrial machinery
·Outdoor piping and protective frameworks
Key Features
·Anti-corrosion electro-coating finish (black)
·Uniform coating on internal and external surfaces
·High adhesion and durability
·Suitable for welding, bending, or machining
·Available in various steel grades and sizes
Technical Specifications Table
|
Parameter |
Specification |
|
Material / Steel Grade |
S235, S275, ST52, or other carbon steel |
|
Outer Diameter (OD) |
Customizable, standard and metric sizes |
|
Wall Thickness |
1.5 – 12 mm (depending on application) |
|
Coating Type |
Electro-coating (E-Coating), Black |
|
Corrosion Resistance |
Excellent (passes ISO 9227 salt spray tests) |
|
Surface Finish |
Smooth, uniform, black |
|
Length |
Up to 12 m, cut-to-length available |
Manufacturing Process
1. Steel pipe selection and preparation (cold-rolled or hot-rolled)
2. Surface cleaning and degreasing
3. Electro-coating immersion for full coverage
4. Curing in oven to ensure durable adhesion
5. Inspection – coating thickness, adhesion, and surface uniformity
Applications
·Automotive structural components and chassis
·Construction and civil engineering pipelines
·Industrial equipment and machinery
·Outdoor and corrosion-prone structures
·Furniture frames and protective tubing
Advantages
·Excellent corrosion resistance for long-term durability
·Uniform coating, including inner surfaces
·Compatible with welding, bending, or machining
·Provides aesthetic black finish for visible applications
·Can be combined with other protective coatings if needed
Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide. As Suppliers of E-Coated Steel Pipe – Black Electro-Coating Finish, Anti-Corrosion Steel Tube, our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards. We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Custom E-Coated Steel Pipe – Black Electro-Coating Finish, Anti-Corrosion Steel Tube. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors. Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
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