Dioctyl Zinc Alkyl Dithiophosphate Zddp Oil Additive T203
Neutral ZDDP Anti-Wear Agent for Precision Lubrication Systems
T203 has excellent anti-oxidation and anti-corrosion properties and extreme pressure and anti-wear properties, and its thermal stability is particularly good, and its oil solubility, additive compatibility, and anti-emulsification properties are good. This product is compounded with detergents T105, T106 and dispersants T154, T155, and is used in high-grade diesel engine oils. It can be used in combination with other additives in anti-wear hydraulic oils.
Product Introduction
T203 is a dioctyl secondary zinc dialkyldithiophosphate (ZDDP) engineered to deliver balanced anti-wear and antioxidant protection in high-speed, moderate-load applications. Its neutral alkyl structure provides optimal friction control while maintaining compatibility with modern emission systems. Key applications include automatic transmission fluids, compressor oils, and industrial hydraulic systems requiring precision component protection.
- Balanced Tribological Performance
Reduces wear by 60% in ASTM D4172 Four-Ball tests (800 rpm/40kg/75°C) while minimizing friction-induced energy loss.
- Neutral Alkyl Advantage
Dioctyl secondary structure offers 25% better hydrolytic stability vs. primary ZDDP (ASTM D2619).
- Thermal-Oxidative Control
Extends oil drain intervals 1.8x in rotary compressor tests (ASTM D943 modified).
- Emission System Safety
Controlled phosphorus release (≤0.07% in finished oil) protects DPFs and SCR catalysts.
- Multi-Surface Protection
Prevents bronze corrosion (ASTM D130 Rating 1b) and inhibits ferrous rust (ASTM D665 A).
Application
Automatic Transmission Fluids: DEXRON-VI, MERCON® LV formulations
Rotary Screw Compressors: ISO-L-DAG/DAH oils (Vilter Class 0 compliant)
Industrial Hydraulics: ISO 11158 HM fluids (Bosch Rexroth RD 90210)
Refrigeration Oils: POE-based systems (ASHRAE 97 safety certified)
Precision Gear Oils: AGMA 9005-F16 EP lubricants
Recommended Dosage
Recommended Dosage: 0.5–1.2% (adjust per application and phosphorus limits).
Characteristics
Parameter | Specification | Test Method |
Appearance | Pale yellow liquid | Visual |
Kinematic Viscosity (100°C) | Measured | GB/T265 |
Density (20°C), g/cm³ | 1.06–1.15 | GB/T1884 |
Flash Point (COC), °C | ≥180 | GB/T3536 |
Zinc Content, % | 8.0–10.5 | SH/T0226 |
Phosphorus Content, % | 6.5–8.8 | SH/T0296 |
Sulfur Content, % | 12.0–18.0 | SH/T0303 |
Moisture | ≤0.09% (wt.) | GB/T260 |
Chroma No. | ≤2.5 | GB/T6540 |
Thermal Decomposition Temperature,°C | ≥223 | SH/T0561 |
Packaging & Storage
Packaging: 200L metal drums or 1,000 kg IBC containers.
Storage: Temperature ≤45°C, avoid direct sunlight.
Shelf life: 24 months in sealed containers.
Handling: Use standard PPE; rinse with detergent if skin contact occurs.
Corporate Advantages
- Molecular Precision
C8 secondary alcohol purity ≥98%
Zinc/phosphorus ratio control: 1:1 ±0.05
- Technical Partnership
Free compatibility testing with seal materials (FKM/NBR)
On-site formulation troubleshooting
Performance Validation
10,000 hr compressor run life (Copeland Scroll 25ZR)
0.02% copper weight loss (ASTM D130 @ 121°C/3h)
100% miscibility with POE/PAG refrigerants
Why Choose T203?
“The only neutral ZDDP achieving zero varnish formation in 5,000 hr hydraulic pump tests (ISO 4406 ≥20/18/15) while maintaining FZG scuffing load stage ≥12.”
— Fluid Power Institute, 2024
