TBN400 overbased Calcium Sulfonate for grease

Description

Overbased calcium sulfonate is an additive commonly used in grease formulations. It serves multiple purposes, primarily as a detergent and rust inhibitor. The term “overbased” indicates that it contains an excess of basic calcium salt compared to the stoichiometric amount, which enhances its performance.

Here’s how it works in grease:

Detergency: Overbased calcium sulfonate acts as a detergent, helping to keep surfaces clean by dispersing and neutralizing acidic byproducts formed during the lubrication process. This prevents the formation of deposits and sludge, improving the grease’s efficiency.

Corrosion Protection: It provides excellent rust and corrosion protection, safeguarding metal surfaces from degradation due to moisture and other corrosive elements.

Extreme Pressure (EP) Properties: It also contributes to the grease’s EP properties, enhancing its ability to withstand heavy loads and high pressures without allowing metal-to-metal contact.

Thermal Stability: Overbased calcium sulfonate can improve the thermal stability of the grease, allowing it to perform consistently at high temperatures.

Overall, the addition of overbased calcium sulfonate to grease formulations helps in maintaining equipment reliability, extending component life, and ensuring smooth operation under various conditions.

TBN 400 overbased calcium sulfonate (OCS) is a common and versatile additive used in grease formulations. Here’s a breakdown of its properties and applications:

Properties:

High Total Base Number (TBN): The TBN of 400 indicates its strong acid-neutralizing ability, making it effective in reducing wear and preventing corrosion in acidic environments.
Good shear stability: This ensures the additive remains dispersed within the grease even under high shear forces, maintaining its effectiveness throughout the grease’s lifespan.
Water resistance: OCS offers moderate water resistance, making it suitable for applications with occasional water contact.
High drop point: This refers to the temperature at which the grease thickens excessively. OCS typically has a high drop point, allowing it to function effectively at elevated temperatures.
Cost-effective: Compared to other high-performance additives, OCS is generally more affordable.

Applications:

Industrial greases: OCS is widely used in industrial greases for bearings, gears, and other components operating under moderate loads and temperatures.
Automotive greases: It can be found in some automotive greases for chassis and wheel bearings, particularly in older vehicles.
Marine greases: Due to its moderate water resistance, OCS can be used in some marine greases for applications with occasional water exposure.

Limitations:

Thermal stability: While it has a high drop point, OCS may not be suitable for extremely high-temperature applications compared to some synthetic additives.
Oxidative stability: It offers moderate protection against oxidation, and synthetic additives might be preferred for applications requiring extended protection.
Water resistance: Not as water-resistant as some specialized additives designed for heavy water exposure.

Overall, TBN 400 overbased calcium sulfonate is a reliable and cost-effective additive for various grease applications. However, its limitations in thermal stability, oxidative stability, and water resistance should be considered when choosing the right grease for specific needs.

Additional factors to consider when choosing a grease with TBN 400 OCS:

Base oil type: Mineral, synthetic, or semi-synthetic base oil can affect the grease’s overall performance and compatibility with OCS.
Thickener type: Different thickeners can influence the grease’s consistency, water resistance, and other properties.
Specific operating conditions: Temperature, pressure, load, and contamination levels play a crucial role in selecting the optimal grease formulation.

Consulting a lubricant specialist or tribologist can help you choose the right grease with TBN 400 OCS based on your specific application and requirements.

I hope this information is helpful! Let me know if you have any further questions.