Overbased detergents are additives designed to clean the metal surfaces within a fired engine and prevent the build-up of deposits. The insoluble by-products of the combustion process are removed by the detergents in the lubricants. Detergents find extensive use in marine, passenger car motor oil and heavy duty diesel applications. In addition to cleaning the metal surfaces within a fired engine, overbased detergents also help neutralize acidic combustion by-products to prevent corrosion within the engine. For neutral TBN overbased detergents, see our Lobase® portfolio.
Fire-side corrosion inhibitors are additives that are designed to prevent corrosion from combustion products resulting from the burning of fuels containing sulfur, vandium and other heavy metals. These products are primarily used in heavy fuel-fired turbines for electrical power generation.
Hybase® calcium sulfonate detergents
| Hybase® | Carbonate form | Calcium, wt% | Calcium Sulfonate, wt% | TBN, mg KOH/g | Viscosity @ 100°C, cSt |
| C-231 | Crystalline | 10.5 | 18.5 | 285 | 100 |
| C-311 | Amorphous | 12.0 | 28.0 | 305 | 75 |
| C-313 | Amorphous | 12.0 | 28.0 | 305 | 75 |
| C-320 | Amorphous | 12.7 | 25.0 | 320 | 100 |
| C-401 | Amorphous | 15.7 | 19.3 | 418 | 70 |
| C-402 | Amorphous | 15.2 | 18.5 | 405 | 75 |
| C-400 HS | Amorphous | 15.0 | 25.0 | 395 | 90 |
| C-500 | Amorphous | 18.5 | 20.0 | 495 | 200 |
Hybase® magnesium sulfonate detergent
| Hybase® | Carbonate form | Magnesium, wt% | MagnesiumSulfonate, wt% | TBN, mg KOH/g | Viscosity @ 100°C, cSt |
| M-401 | Amorphous | 9.3 | 28.0 | 395 | 150 |
Hybase® fire-side corrosion inhibitors
| Property | Method | Hybase® | |||
| M-11D |
M-12D | M-13D | M-14D | ||
| Magnesium, wt % | ASTM D4951 | 11.2 | 12.2 | 13.2 | 14.2 |
| Mg Sulfonate, wt % | ASTM D3712 | 10.0 | 11.0 | 12.0 | 13.0 |
| TBN, mgKOH/g | ASTM D2896 | 505 | 550 | 595 | 640 |
| Viscosity @100°C, cSt | ASTM D445 | 15 | 25 | 50 | 60 |
| Specific gravity @15°C | ASTM D4052 | 1.150 | 1.190 | 1.230 | 1.250 |
| Flash point (COC) | ASTM D92 | 100 | 100 | 100 | 100 |
| Color(dilute) | ASTM D1500 | 3.0 | 3.5 | 3.5 | 4.0 |
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