Decorative oxide film

Conversion coating type: Decorative oxide film Application areas: Radiator covers, business-class cabin table panels Partners: China Railway Corporation‑affiliated enterprises including Zhuzhou, Qingdao Sifang, and Changchun Railway Vehicles Co., Ltd. Advantages of the conversion coating: Interior components such as high-speed train windows, radiator covers, and table panels all require an E6 (matte silver satin) decorative finish; this coating is widely used in numerous aluminum alloy decorative products.

Heavy-duty anti-corrosion oxide film

Conversion coating type: Heavy-duty anti-corrosion oxide film Application areas: SGT rotary seat legs and cover plates Partners: China Railway Corporation, Zhuzhou, Qingdao Sifang, and Changchun Railway Vehicles Co., Ltd. Advantages of the conversion coating: All externally sourced high-speed train carriage components are subject to stringent requirements for resistance to corrosion in marine humid environments; moreover, Bombardier and SGT orders also impose these same requirements.

Self-lubricating hard oxide film

Conversion coating type: Self-lubricating hard oxide coating Application areas: High-speed railway automatic door tracks, aluminum alloy profiles for luggage racks Partners: CRRC-affiliated enterprises including Zhuzhou, Qingdao Sifang, and Changchun Railway Vehicles Co., Ltd. Advantages of the conversion coating: This self-lubricating oxide coating maintains a low coefficient of friction over long periods without the use of lubricants, operates silently, and requires no maintenance. It is suitable for all types of automatic door tracks, such as those in operating rooms and libraries, where a quiet, automated environment is essential.

Native hard anodic oxide film

Conversion coating type: Natural‑color hard anodized coating Application area: High-speed rail entrance steps Partner companies: CRRC subsidiaries in Zhuzhou, Qingdao Sifang, and Changchun Railway Vehicles Advantages of the conversion coating: While aluminum alloy hard anodized coatings typically come in various colors, high-speed rail car designs mandate a uniform silver‑white finish for the aluminum exterior (except for door rails). Through advanced technical processes, our company has successfully achieved exceptionally high hardness and superior wear resistance in 6-series aluminum alloys at specified hardness levels.

Alodine coating

Conversion coating type: Alodine coating Application area: Primer for military‑grade coatings Partners: AVIC, Shandong AVIC, Hui, and other enterprises Advantages of the conversion coating: Both the natural‑color and yellow‑tinted coatings have been incorporated into MIL‑C‑5541E, the U.S. military standard for “Chemical Oxidation of Aluminum and Aluminum Alloys,” and are now widely adopted in domestic military specifications. Due to hexavalent chromium contamination, few manufacturers outside the southern military‑industrial complex currently employ this process, making it a relatively rare and specialized technology.

Anti-fatigue oxide film

Conversion coating type: Anti‑fatigue oxide film Application areas: Aluminum alloy components in missile propulsion systems, control surfaces, aerospace vehicles, and weapon systems Partners: Fenghua Science & Technology and other enterprises have become strategic partners Advantages of the conversion coating: Traditionally, this type of oxide film was produced via chromic acid anodizing; however, due to environmental concerns, boron–sulfuric acid anodizing has now largely replaced it. The challenge is that, under identical processing conditions, different aluminum alloys yield significantly varying film characteristics. Through years of production experience, our company has developed a proprietary technology that has been widely recognized by local defense‑industry customers. Nevertheless, insufficient marketing efforts have occasionally led to communication gaps between our clients and our enterprise.

Heavy-duty anti-corrosion conversion coating

Conversion‑coating type: Heavy‑duty anti‑corrosion conversion coating Application field: Nuclear‑power‑plant volute casings at the Institute of Large Electric Machines Partners: Institute 624 and the Institute of Electric Machines Conversion‑coating advantages: For the Institute of Electric Machines’ volute‑casing project, we established an engineering test center and successfully developed a hard, heavy‑duty anti‑corrosion conversion coating for extra‑large aluminum‑alloy volute casings, thereby forging a strategic partnership with the Institute of Large Electric Machines.

Superimposed functional conversion film

Conversion Film Category: Multilayer Functional Conversion Films Application Areas: All sensor‑related components at CETC Institute 49 Partner Institutions: Institute of Engineering Mechanics, Institute of Earthquake Engineering Advantages of Conversion Films: For 24 years, we have been developing a wide range of functional conversion films for CETC Institute 49, establishing a long‑term strategic partnership. We have also provided tailored R&D support for the conversion‑film needs of the Institute of Engineering Mechanics and the Institute of Earthquake Engineering over the past decade, solidifying strategic collaborative relationships.