PROPRIETARY PROCESS
SURFACE ALLOY
TECHNOLOGY
Our unique metallurgical infiltration process creates a permanent alloy phase layer on carbon steel — not a coating, not a liner, but a fundamental transformation of the pipe surface at the atomic level.
THE PROCESS
HOW IT WORKS
01
Substrate Preparation
Carbon steel pipe (J55, N80, L80, P110) is thoroughly cleaned and prepared to ensure optimal infiltration conditions.
02
Metallic Element Infiltration
Using our proprietary infiltration process, metallic elements (boron for ZteenBor, aluminum compounds for ZteenSS) are driven into the carbon steel substrate under controlled conditions.
03
Ordered Solid Solution Formation
The infiltrated elements react with the substrate to form an ordered solid solution phase layer — a dense, uniform crystalline structure that is metallurgically bonded to the base material.
04
Quality Verification
Each pipe is tested to API 5CT/5L standards. Layer thickness (100–500μm), hardness, and corrosion resistance are verified before delivery.
CROSS-SECTION ANALYSIS
The alloy layer (amber/gold) is clearly distinct from the carbon steel substrate (dark). The metallurgical bond at the interface ensures no delamination under thermal cycling, mechanical stress, or chemical attack.
COMPETITIVE ADVANTAGE
VS OTHER PROTECTION METHODS
| PROPERTY | EPOXY COATING | HDPE LINER | POWDER SPRAY WELD | ZteenSS / ZteenBor |
|---|---|---|---|---|
| Bond Type | Mechanical | Mechanical | Semi-metallic | Metallurgical |
| ID Change | Significant | Significant | Significant | Negligible |
| Delamination Risk | High | Medium | Medium | None |
| H₂S Resistance | Limited | Good | Good | Excellent |
| Temperature Limit | ~150°C | ~80°C | ~400°C | 700°C |
| Recyclable | No | No | Partial | Yes |
| API Standard | Varies | Varies | Varies | 5CT/5L |
QUALITY ASSURANCE
TESTING STANDARDS
ISO 17081:2004
Hydrogen Permeation
No permeation detected in 24h
3.5wt% NaCl + 0.1wt% Na₂S, 35°C
NACE TM0284-16
HIC Resistance
CLR = 0%, CTR = 0%, CSR = 0%
5.0wt% NaCl + 0.5wt% Acetic acid, H₂S saturated, 96h
ASTM G48 Method A
Pitting Resistance
No pitting evidence (20× magnification)
FeCl₃ solution, 50°C, 72h
ASTM G65
Wear Resistance
0.039g loss (vs 0.621g for J55)
Dry abrasion, 400N torsion, 21,600 rev/h, 4.5h
API 5CT
Tubing & Casing
Full compliance
All dimensions maintained within API tolerance
API 5L
Line Pipe
Full compliance
Grades X46, X52, X60 available