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By Dr.Luo | 14 August 2020 | 0 Comments

Characteristics of Zinc Dialkyldithiophosphate ZnDDP Liquid

Main Application of Lubricating Oil in Modern Industry

Lubricating oil mainly plays a role in four aspects in modern industry: to prevent wear on the mechanical surface; as a coolant or heat transfer medium; to help seal the compression ring; adhere to the mechanical surface to keep the mechanical surface clean. Generally, various additives with a mass fraction of about 10% are added to industrial lubricants to improve the performance of the oil. Zinc dialkyl dithiophosphate (ZDDP) is widely used because of its good oxidation resistance and anti-wear properties. Zinc dialkyl dithiophosphate is a compound synthesized with alcohol, phosphorus pentasulfide and zinc salt as raw materials. It mainly depends on the role of zinc dialkyl dithiophosphate in preventing the oxidation of lubricating oil and reducing mechanical wear.

Antioxidant Simulation Experiment and Results of Zinc Dialkyldithiophosphate

Antioxidants can delay the oxidation of lubricating oil and prevent the production of corrosive substances. Antioxidants play an anti-oxidant effect by inhibiting the generation of peroxides or scavenging free radicals. Peroxide inhibitors prevent the generation of peroxy radicals by reacting hydrogen with oxide molecules. Both types of antioxidant behavior exist on zinc dialkyl dithiophosphate. Paddy et al. also used laboratory methods to study the same system. In the experiment, high pressure liquid chromatography (HLPC) and phosphorus nuclear magnetic resonance were used to track the experimental products and proposed that the oxidation reaction may be a kinetic first-order reaction, and the experiment also proved that phosphorus nuclear magnetic resonance Very effective in studying oxidation products of zinc dialkyl dithiophosphate.


Zinc Dialkyl Dithiophosphate As an Anti-wear Extreme Pressure Additive

As a kind of antiwear additive with good performance, zinc dialkyldithiophosphate is widely used. Coy and Jones used nuclear magnetic resonance (NMR) to study the thermal decomposition of zinc dialkyldithiophosphate in mineral oil after heating, and used a four-ball friction and wear test device to investigate the extreme pressure properties of the decomposition products. The zinc dialkyl dithiophosphate was heated to 180 C, and some samples were taken out for analysis after 1, 4, 8, and 16 h. After detailed analysis of the structure of the decomposition product by phosphorus nuclear magnetic resonance ("'P-NMR) and hydrogen nuclear magnetic resonance ('H-NMR), it was found that the product not only contains the transfer of alkyl groups between molecules, but also contains alkyl groups. Group migration and sulfur intermolecular transfer. They also used X-ray fluorescence spectroscopy to study thermal experimental deposits. Since most of the zinc dialkyl dithiophosphates are decomposed by heating, there is a small amount of dioxane. Zinc dithiophosphate has little effect on extreme pressure performance, so the test results show that the thermal decomposition product of zinc dialkyl dithiophosphate itself has extremely high extreme pressure resistance.


TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years experience in providing super high quality chemicals and Nano materials. The Zinc Dialkyldithiophosphate ZnDDP Liquid produced by our company has high purity, fine particle size and impurity content. Lower, please contact us if necessary.

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