Metalworking Fluid Additives

Metalworking fluid additives play a vital role in modern machining and forming operations. Whether in cutting, grinding, stamping, or rolling, high-performance additives ensure that metalworking fluids provide the right balance of cooling, lubrication, corrosion protection, and system stability. Without the right additives, metalworking fluids would fail quickly, leading to tool wear, poor surface finish, or corrosion issues.

Ruqinba offers a comprehensive portfolio of additives that cover every critical function in metalworking fluids. Our solutions are designed to enhance performance, extend fluid life, and comply with the latest environmental and regulatory standards. From lubricity boosters to advanced corrosion inhibitors, our additives help formulators create next-generation fluids for demanding applications.

Lubricity additives play a critical role in metalworking fluids by reducing friction, improving surface finish, and extending tool life. They enhance machining efficiency and provide protection under boundary lubrication conditions. Ruqinba offers a diversified portfolio of esters and polymeric lubricity improvers designed for soluble oils, semi-synthetic, and fully synthetic formulations.

1606 Emulsifiable Ester

• Key Features:
  • Excellent hydrolytic stability, maintaining performance without decomposition for up to one year.
  • High tolerance to water hardness (up to 2000 ppm), ensuring stable emulsions in diverse water qualities.
  • Suitable for semi-synthetic cutting fluids, offering long-term reliability in demanding conditions.

• Typical Treat Rates:
  • Soluble cutting and grinding oils: 3–6%
  • Fully synthetic cutting and grinding fluids: 3–12%
  • Drawing and stamping soluble oils: 5–10%
  • Drawing and stamping synthetics: 8–15%
  • Aluminum hot rolling oils: 3–5%

• Competitive Alternative: Croda Priolube™ 3952

1600 Emulsifiable Ester

• Key Features:
  • High-performance ester designed for fully synthetic fluids.
  • Excellent hydrolytic stability (up to one year) and hard water resistance (up to 2000 ppm).
  • Provides strong lubricity and compatibility across multiple metalworking fluid systems.

• Typical Treat Rates:
  • Soluble cutting and grinding oils: 3–6%
  • Fully synthetic cutting and grinding fluids: 3–12%
  • Drawing and stamping soluble oils: 5–10%
  • Drawing and stamping synthetics: 8–15%
  • Aluminum hot rolling oils: 3–5%

• Competitive Alternatives: Croda Priolube™ 3955 / Priolube™ 3956

RQB-GY25 Polymeric Ester

• Key Features:
  • Provides excellent boundary lubrication and extreme pressure (EP) performance.
  • Particularly effective in high-load machining and forming operations.
  • Designed as an environmentally friendly alternative to chlorinated paraffins when blended with phosphorus- or sulfur-based EP agents.
  • Enhances tool life and reduces wear under severe cutting conditions.

• Typical Treat Rates:
  • Cutting oils: 1–10%
  • Stamping oils: 1–10%
  • Drawing oils: 2–10%
  • Water-based cutting fluids: 3–5%

• Competitive Alternative: Lubrizol SYN-ESTER GY-25

1516 Polyether Ester

• Key Features:
  • Designed for fully synthetic metalworking fluids.
  • Superior lubricity compared with conventional polyethers, reducing additive treat cost.
  • Outstanding resistance to tramp oil contamination, improving fluid stability and extending service life.
  • Enhances both lubricity and cost efficiency in synthetic formulations.

• Typical Treat Rates:
  • Fully synthetic metalworking fluids: 3–20%

• Competitive Alternatives: Traditional Polyether-based lubricity agents

In high-load machining and forming operations, anti-wear (AW) and extreme pressure (EP) additives are critical to extend tool life, reduce wear, and protect both ferrous and non-ferrous metals. Phosphoric acid esters are widely used because they form strong tribochemical films on the metal surface, providing excellent EP/AW performance, while also delivering anti-corrosion benefits. Ruqinba’s phosphorus-based technology ensures high efficiency, long-term stability, and multi-metal compatibility.

1008 Phosphoric Acid Ester

• Key Features:
  • Highly efficient EP/AW additive for metalworking fluids, rolling oils, gear oils, and fire-resistant hydraulic fluids (HFD, HFD-U).
  • Excellent corrosion protection for both steel and aluminum alloys.
  • Effective in minimizing copper and cobalt leaching, improving multi-metal compatibility.
  • Provides strong wear resistance even under severe operating conditions.

• Typical Treat Rates:
  • Semi-synthetic / microemulsions: 0.5–1.5%
  • Fully synthetic fluids: 1–2%

• Competitive Alternative: Clariant Hordaphos® ITD

1006 Phosphoric Acid Ester

• Key Features:
  • Cost-effective alternative to 1008 with similar EP/AW and corrosion protection performance.
  • Based on alcohol-derived phosphate ester chemistry, offering a more economical choice without compromising quality.
  • Particularly suitable for price-sensitive customers and formulations targeting balanced performance and cost.
  • Delivers strong anti-wear protection while maintaining multi-metal compatibility.

• Typical Treat Rates:
  • Semi-synthetic / microemulsions: 0.5–1.5%
  • Fully synthetic fluids: 1–2%

• Competitive Alternative: Clariant Hordaphos® ITD (positioned as a more economical substitute)

Short- and long-term corrosion of ferrous metals is a persistent challenge during machining, storage, and transportation. Effective rust inhibitors not only protect components but also ensure overall fluid stability without causing emulsification or odor issues. Ruqinba’s rust preventive technology enables formulators to achieve strong anti-corrosion performance while meeting environmental and operator safety demands.

3038 Solubilizing Rust Inhibitor

• Key Features:
  • Dual-function additive: provides both rust-prevention and solubilizing power for block copolymer surfactants and lubricants.
  • Replaces traditional neodecanoic acid, eliminating unpleasant odor and irritation while improving workplace safety.
  • Enhances solubility in formulations without compromising emulsion stability.
  • Offers effective corrosion protection for ferrous metals, making it suitable for demanding synthetic and cleaning fluid applications.
  • Improves overall system compatibility, ensuring long service life and formulation robustness.

• Typical Treat Rates:
  • Fully synthetic metalworking fluids: 2–10%
  • Neutral to alkaline cleaners: 2–10%

• Competitive Alternative: Neodecanoic Acid (Neodecanoate)

Non-ferrous metals such as aluminum, copper, and their alloys are prone to staining, pitting, or leaching in water-based systems. Corrosion inhibitors are essential to ensure long-term protection, maintain surface finish, and extend fluid service life. Ruqinba provides innovative inhibitor technologies tailored for multi-metal systems, ensuring strong performance without compromising fluid stability.

1022C Siloxanone (Aluminum Corrosion Inhibitor)

• Key Features:
  • Highly effective water-soluble siloxanone, designed specifically for water-based metalworking fluids.
  • Provides robust protection for aluminum alloys, preventing staining, pitting, and surface darkening.
  • Also offers inhibitory effects on solder corrosion, significantly reducing corrosion in aqueous environments.
  • Fully soluble in synthetic and semi-synthetic fluids, ensuring excellent formulation compatibility.

• Typical Treat Rates:
  • Fully synthetic fluids: 1–2%
  • Semi-synthetic / microemulsions: 0.5–1.5%

• Competitive Alternatives: Proprietary water-soluble siloxane-based inhibitors (commonly offered by Japanese and European suppliers).

1008 / 1006 Phosphoric Acid Esters (multi-functional inhibitors)

• Key Features (summary):
  • Dual-function additives, acting as both EP/AW agents and corrosion inhibitors.
  • Strong protection for steel and aluminum alloys, while reducing leaching of copper and cobalt.
  • 1008 offers high performance and broad multi-metal compatibility.
  • 1006 provides a cost-effective alternative with similar protection, ideal for price-sensitive formulations.

• Typical Treat Rates:
  • Semi-synthetic / microemulsions: 0.5–1.5%
  • Fully synthetic fluids: 1–2%

• Competitive Alternative: Clariant Hordaphos® ITD

Hard water ions (Ca²⁺, Mg²⁺) can destabilize emulsions, reduce additive efficiency, and significantly shorten the service life of metalworking fluids. Anti-hard water agents (chelating surfactants) are designed to improve fluid stability under diverse water conditions, enhance biodegradability, and help meet increasingly stringent environmental regulations. Ruqinba provides high-performance stabilizers equivalent to well-known international products.

9H-LF Fatty Alcohol Polyoxyethylene Ether (Anti-hard Water Agent)

• Key Features:
  • Excellent resistance to hard water up to 2000 ppm.
  • Enhances emulsion stability and extends fluid service life.
  • Good biodegradability, supporting eco-friendly formulations.

• Typical Treat Rates:
  • Fully synthetic metalworking fluids: 0.5–1.5%
  • Semi-synthetic metalworking fluids: 0.5–1.5%

• Competitive Alternatives: Sasol Marlowet 4570LF, Clariant Emulsogen COL 100

90VG Fatty Alcohol Polyoxyethylene Ether (Anti-hard Water Agent)

• Key Features:
  • Premium-grade stabilizer suitable for the most demanding water qualities.
  • Delivers the same anti-hard water effect as 9H-LF, with optimized formulation compatibility.
  • Designed as a drop-in equivalent to leading international products, ensuring easy adoption.

• Typical Treat Rates:
  • Fully synthetic metalworking fluids: 0.5–1.5%
  • Semi-synthetic metalworking fluids: 0.5–1.5%

• Competitive Alternatives: Sasol Marlowet 4570LF, Clariant Emulsogen COL 100, Kao Corporation AKYPO RO90VG

Beyond the core lubricity, anti-wear, rust-preventive, and anti-corrosion functions, modern metalworking fluids require auxiliary additives to ensure long-term stability, cleanliness, and performance consistency. Ruqinba’s auxiliary additives provide essential support for system stability, emulsification, and microbial control, ensuring balanced and durable formulations.

AY77B Settling Agent

• Key Features:
  • Multi-functional additive designed for fully synthetic fluids.
  • Promotes flocculation and settling of impurities, improving system cleanliness.
  • Strong anti-tramp oil performance and excellent demulsification, enhancing fluid stability.
  • Provides broad-spectrum antimicrobial support, extending fluid life.

• Typical Treat Rates:
  • Fully synthetic fluids: ~0.5%

• Competitive Alternatives: BUSAN 77 / Mayosperse 60

X68 Emulsifier (Erucamide-based)

• Key Features:
  • Premium emulsifier offering stable oil–water emulsions, enhanced lubricity, and rust protection.
  • Low-foam profile, ideal for foam-sensitive systems.
  • Provides multi-functional benefits beyond emulsification, improving formulation efficiency.

• Typical Treat Rates:
  • Semi-synthetic / soluble oil systems: 3–6%

• Competitive Alternatives: Sasol MARLOX RT 42 / OP / NP / AEO series

X66 Emulsifier (Erucamide-based)

• Key Features:
  • Cost-effective emulsifier with performance comparable to X68, but optimized for price-sensitive formulations.
  • Maintains stable emulsification, low foam, and multi-functional benefits.

• Typical Treat Rates:
  • Semi-synthetic / soluble oil systems: 3–6%

• Competitive Alternatives: Sasol MARLOX RT 42 / OP / NP / AEO series

Ruqinba’s additives portfolio is engineered to help formulators achieve the perfect balance of lubricity, protection, and stability. Our solutions are:

• Environmentally friendly and designed to replace chlorinated paraffins.
• Compatible with multiple base oil systems and water qualities.
• Cost-optimized to meet diverse customer needs.
• Supported by technical expertise and global supply reliability.

By integrating Ruqinba additives into your formulations, you can extend tool life, reduce downtime, improve workpiece quality, and comply with future-oriented regulations.