Surface Treatment Research

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Car Engine Piston Rings

The surface treatment of piston rings can greatly improve its performance. Our nitriding coating obtained national key torch award. We have independently developed physical vapor deposition PVD coating and DLC coating (Diamond Like Carbon), which have improved the performance and reliability of piston rings and got the market recognition.

Dongya provides surface treatment on a variety of materials, please contact us!

Main types of surface treatment

Phosphating(except for the expander);

Hard chromium plating (outer circular, partially scraper inner circles);

Nitriding(stainless steel compression ring, scraper, expander);

PVD (compression ring, scraper outer circular)

DLC(compression ring, scraper outer circular)

The main function surface treatment

Phosphating - antirust and favorable to  running-in;

Hard chromium - improving wear resistance;

Nitriding - improving wear resistance;

PVD - improving wear resistance;

DLC - improves wear and coring resistance;


01Research centers


Technology Center: The company's technology center is responsible for the introduction, digestion and absorption of new technologies, new product research and development, evaluation and transformation of scientific research results, and product market research, formulating annual scientific research plans for market research, making plans for the use of scientific research funds, recruitment and selection of scientific research talents, and creating a team of talented people with strong innovation ability and excellent technology.

The technology center attaches great importance to the mining of new technologies and research and development of new products, and the results have been transformed significantly. In 2010, the company's technology center was identified as "Engineering Technology Research Center of Internal combustion engine piston Ring Enterprise in Fujian Province".

0240 patents

0316 Revision of national technical standards

04Won the third prize of Fujian Provincial Science and Technology Award (Certificate No. : 2009-3-01-6) Fujian Provincial People's Government

Powered by strong technical development and continuous innovation ability, DY PISTON RING ranks among the leading brands.

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