Thiadiazole-based Metal Corrosion Inhibitors

Thiadiazole-based Metal Corrosion Inhibitors are oil-soluble ashless lubricant additives developed and produced by Fanschem. Covering serial DMTD derivatives including DMTD-8, DMTD-12 and multi-functional compounded grades, these liquid additives firmly adsorb onto non-ferrous metal surfaces to form dense, stable protective films, passivate active metal ions and restrain copper & brass corrosion effectively. They also suppress catalytic oil oxidation triggered by metal components, feature excellent thermal durability, outstanding hydrolytic stability and superior compatibility with antioxidants, anti-wear agents and other conventional lubricant additives. Widely adopted in automotive engine oils, gear oils, hydraulic fluids, industrial greases, transformer oils and metalworking liquids, Fanschem provides tailor-made formulations compliant with global low-sulfur, low-ash lubrication specifications, offering steady large-volume supply and dedicated technical formulation guidance for lubricant manufacturers worldwide.

What Are Thiadiazole-based Metal Corrosion Inhibitors?

Thiadiazole-based Metal Corrosion Inhibitors are oil-soluble ashless DMTD derivative lubricant additives designed to prevent copper and copper alloy corrosion, capture active sulfur and deliver auxiliary antioxidation and anti-wear performance under boundary and mixed lubrication conditions. Different from conventional benzotriazole metal deactivators with poor high temperature resistance and limited sulfur neutralizing capacity, the entire Fanschem thiadiazole series adopts liquid formula, including DMTD monomer, short-chain DMTD-8, medium-chain DMTD-9, long-chain CSAIL DMTD-12 and high-temperature resistant CSAIL T561. These products can firmly adsorb on yellow metal surfaces to form dense protective tribofilms, effectively blocking corrosion caused by sulfides and acidic oxidation byproducts. Benefiting from stable copper passivation performance and good antioxidant synergism, they are widely adopted by global lubricant formulators as standard anti-corrosion raw materials.

Core Performance & Key Features of Thiadiazole-based Corrosion Inhibitors

All grades of Fanschem thiadiazole corrosion inhibitors share consistent outstanding overall performance while possessing differentiated advantages:

• Excellent copper corrosion inhibition: Effective against active sulfur corrosion at low dosage, fully protect copper bearings, synchronizer rings and other copper alloy components from discoloration and pitting damage.

• Ashless molecular structure: Perfectly match low-SAPS low-emission lubricant systems, greatly extend oil service life when compounded with common antioxidants.

• Multifunctional properties: Combine metal passivation and auxiliary extreme pressure anti-wear functions to reduce mechanical abrasion under heavy loads.

• Superior thermal stability: Long-chain variants maintain stable anti-corrosion performance under continuous high-temperature operating conditions.

• Wide additive compatibility: No chemical conflict with organic molybdenum friction modifiers, sulfurized EP agents, detergents and dispersants.

• Good oil solubility: Transparent liquid products disperse evenly in all base oils without precipitation after long-term storage.

Technical Advantages Over Conventional Metal Deactivators

Compared with benzotriazole and other traditional heterocyclic metal passivators, Fanschem thiadiazole additives have prominent technical strengths:

• Stronger active sulfur scavenging capability: Rapidly eliminate free sulfur pollutants and solve the problem of copper blackening prevalent in gear oils and sulfur-rich metal working fluids.

• Full ashless composition: No metallic elements inside molecules, no ash deposition on automotive three-way catalytic converters, compliant with global low sulfur and low phosphorus emission standards.

• Better high-temperature durability: Modified alkyl chain structure slows thermal decomposition, and the surface protective film will not fail rapidly under harsh working conditions.

• Self-repairing protective film: The adsorption layer can replenish itself automatically during equipment operation, providing longer-lasting anti-corrosion protection.

• Broad-spectrum metal protection: Applicable to brass, bronze, copper-lead bearing alloys for both passenger vehicles and heavy engineering machinery.

• Harmonious compatibility with organic molybdenum additives: Joint formula realizes friction reduction, anti-wear and copper anti-corrosion simultaneously for energy-saving engine oils.

Main Applications of Thiadiazole Metal Corrosion Inhibitors

Fanschem thiadiazole series is widely used in automotive and industrial lubricant formulation scenarios:

• Automotive lubricants: Gasoline engine oil, diesel engine oil, automatic transmission fluid, manual gear oil, used to safeguard internal copper parts of vehicle lubrication systems.

• Industrial lubricants: Hydraulic oil, compressor oil, circulating oil and various industrial greases to restrain oil oxidation and metal rust in long-cycle lubrication systems.

• Metal working fluids & fuel additives: Prevent copper workpiece corrosion in sulfur-containing cutting fluids; serve as fuel metal deactivators to reduce gum generation inside fuel pipelines.

• Low-emission eco-friendly lubricants: Ashless long-chain thiadiazole products are preferred formulations for catalyst-compatible low-SAPS high-grade engine oils.

• Heavy-duty machinery lubrication: Suitable for construction, mining and agricultural machinery enduring high temperature and sulfur contamination.

Technical Specifications & Fanschem Thiadiazole Product Parameters

Fanschem supplies 5 mature industrial thiadiazole corrosion inhibitors, and all technical indicators support personalized adjustment:

• DMTD: Core intermediate raw material for synthesizing all thiadiazole derivatives.

• DMTD-8: Short-chain universal grade, cost-effective for conventional engine oils and general industrial lubricants.

• DMTD-9: Medium-chain condensate, ideal for fuel additives and multi-purpose hydraulic oils.

• CSAIL DMTD-12: Long-chain modified product with enhanced thermal stability for turbocharged engine oil and high-temperature compressor oil.

• CSAIL T561: Premium branched long-chain type, specially developed for high-sulfur gear oil and heavy-duty metal working fluids.

Fanschem Thiadiazole Corrosion Inhibitors Manufacturer Strength

As a professional lubricant additive manufacturer, Fanschem has won recognition from global lubricant manufacturers relying on the following advantages:

• Complete product portfolio covering short, medium and long-chain thiadiazole derivatives to satisfy all metal anti-corrosion formulation requirements.

• Stable batch quality: Strict raw material inspection and finished product testing to ensure consistent performance of each batch.

• International environmental and safety certification, fully compliant with overseas automotive lubricant standards.

• Independent R&D capacity: Continuously optimize molecular structures to adapt to the global trend of low-ash, low-emission lubricants.

• Direct factory supply without middlemen, sufficient inventory to support stable bulk orders worldwide.

Custom Formulation Solutions & Global Bulk Supply Service

Fanschem provides one-stop services for global lubricant factories, distributors and formulators purchasing thiadiazole corrosion inhibitors:

• OEM & ODM customization: Adjust molecular structure, sulfur content and packaging specifications as required.

• Flexible packaging options: Laboratory trial packages, standard iron drums and IBC tanks for different order volumes.

• Professional technical service: Offer formulation dosage guidance, compatibility test data and anti-corrosion performance reports.

• Timely global quotation and reliable cross-border logistics to guarantee on-time delivery of bulk goods.