I. Introduction
Unilong is a professional manufacturer and supplier of specialty chemicals, offering N-Oleoylsarcosine (CAS 110-25-8)–a high-purity, multifunctional corrosion inhibitor designed specifically for industrial applications. With exceptional adsorption properties, thermal stability, and low-dosage efficiency, this product provides reliable rust protection for ferrous metals in metalworking fluids, rust preventive oils, industrial cleaners, and temporary coatings.
II. Product Overview – Why N-Oleoylsarcosine for Industry?
N-Oleoylsarcosine is an N-acyl amino acid derivative consisting of a sarcosine head and an oleoyl tail (C18:1). Its unique amphiphilic structure allows it to adsorb strongly onto metal surfaces via the polar carboxyl group, while the long hydrophobic hydrocarbon chain forms a dense, water-repellent monolayer. This mechanism effectively blocks moisture, oxygen, and corrosive electrolytes, making it an outstanding contact-type corrosion inhibitor for ferrous metals.
Unlike traditional inhibitors (e.g., sulfonates or fatty acid salts), N-oleoylsarcosine exhibits high thermal stability (>220℃ decomposition temperature), excellent oil solubility, and very low effective concentrations – typically 0.01 – 0.5% in finished formulations.
In addition, N-oleoylsarcosine is biodegradable and contains no heavy metals or halogens, making it an environmentally friendlier choice compared to many traditional inhibitors such as nitrites or amine-carboxylates. This aligns with the growing industrial demand for sustainable and low-toxicity additives.
III. Key Performance Advantages
1. Low Dosage – High Efficiency
As low as 0.01% active N-oleoylsarcosine can provide significant rust protection on cast iron and steel surfaces (based on standard humidity cabinet and salt spray tests). This cost-effectiveness allows formulators to reduce additive costs while maintaining superior performance.
2. Excellent Thermal Stability
Unlike many organic inhibitors that decompose above 150–180℃, N-oleoylsarcosine remains stable up to >220℃. This makes it ideal for high-temperature metalworking operations such as grinding, heavy-duty cutting, and hot-mixing of rust preventive greases.
3. Strong Adsorption & Film Formation
The carboxylate group forms a chemical bond with the metal surface, while the oleoyl chain orients outward, creating a hydrophobic barrier. This self-assembled monolayer is thin (nanometer scale) yet highly effective, and it does not interfere with subsequent painting, plating, or assembly processes.
4. Broad Compatibility
N-Oleoylsarcosine is fully soluble in mineral oils (paraffinic and naphthenic), synthetic esters, and most organic solvents. It is also compatible with common industrial additives such as extreme pressure (EP) agents, antioxidants, and other corrosion inhibitors, allowing flexible formulation design.
5. Low Residue & Easy Removal
Unlike overbased sulfonates or heavy waxy inhibitors that leave thick, sticky residues, N-oleoylsarcosine forms a thin, non-tacky film that does not attract dust or interfere with subsequent processing. When protection is no longer needed, the residue can be easily removed with mild alkaline cleaners or common organic solvents, saving time and reducing cleaning costs.
IV. Technical Specifications
| ITEM | STANDARD |
| Appearance | Yellow-brown, vicous liquid |
| Acid value (mgKOH/g) | 153-163 |
| Water content (%) | ≤0.7 |
| pH | ≤4 |
| Active ingredient (%) | ≥90 |
| Fatty acid (%) | ≤10 |
| Gardner Color Scale | 0-8 |
| Density (20℃) | 0.94-0.97 |
V. Industrial Applications
1. Rust Preventive Oils & Greases
Used in both short-term (in-process) and long-term (storage/transport) rust preventive oils. Typical dosage: 0.1–2.0%.
(1)Provides thin, non-tacky film that does not attract dust
(2)Easy to remove with alkaline cleaners or solvents
(3)Protects gears, bearings, hydraulic components, and finished parts
It performs particularly well in multi-metal protection, showing no adverse effects on copper, brass, or aluminum while offering excellent protection for ferrous substrates.
2.Metalworking Fluids (MWFs)
Added to soluble oils, semi-synthetic, and fully synthetic metalworking fluids to protect both the workpiece and the machine tool from rust. Typical dosage: 0.2–1.0%.
(1)Prevents flash rust on freshly machined surfaces
(2)Stable under high shear and high temperature
(3)Does not interfere with emulsion stability
Because it does not promote bacterial growth, N-oleoylsarcosine helps extend fluid sump life and reduces the frequency of biocide addition, lowering overall maintenance costs.
3.Industrial Cleaners for Metal Parts
In aqueous parts washers and spray cleaners, N-Oleoylsarcosine (when neutralized with an amine) provides residual rust protection after cleaning. Typical dosage: 0.05–0.3%.
(1)Prevents flash rust during drying and storage
(2)Leaves a thin protective residue that can be easily removed later
(3)Works synergistically with non‑ionic surfactants
4. Temporary Protective Coatings
Formulated into solvent-based or water-based temporary coatings for metal parts in storage or transit. Dosage: 0.5–2.0%.
(1)Can be applied by spraying, dipping, or brushing
(2)Removable with mild alkaline cleaners
(3)Offers protection for 3–12 months depending on environment
VI. Why Choose Unilong for Industrial Inhibitors?
1. Manufacturer direct-full control over quality, purity, and supply consistency
2. Multiple purity grades (≥90% and ≥98%) for different cost-performance needs
3. Stable production capacity-reliable delivery for R&D samples to bulk orders
4. Technical support-formulation guidance, compatibility testing, and troubleshooting
5. Customized solutions-pre-neutralized water-dispersible grades available upon request
Contact Information
Whether you are formulating anti-rust oils, metalworking fluids, industrial cleaners, or temporary coatings, Unilong’s N-Oleoylsarcosine delivers reliable, cost-effective corrosion protection.
Request a sample, technical data sheet (TDS), or safety data sheet (SDS) today.
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