SY-203 acidic sandblasting agent is a slightly acidic solid used as a pretreatment to produce a uniform, fine sandblasted finish on aluminum surfaces; it contains fluorides and surfactants. It is particularly suitable for aluminum surfaces that have undergone mechanical polishing, electrolytic polishing, or chemical polishing, delivering an impeccable matte finish.

SY-202 alkaline degreaser for aluminum is a concentrated, silicate-free, mildly alkaline powder detergent specially formulated to remove surface oils and oxide films from aluminum and aluminum alloys. The wetting agents in SY-202 can be easily rinsed off metal surfaces without emulsifying oil contaminants—unless the oil itself contains an emulsifier.

SY-201 aluminum‑acid degreaser is a colorless liquid, commonly referred to as “aluminum acid degreaser.” It was specifically developed to streamline the pretreatment process for aluminum alloys, offering the same functionality as the conventional three‑step method—degreasing, alkaline etching, and neutralization. Moreover, it leaves the surface of aluminum and its alloys free of dullness, preserving the original luster of the base material. Notably, its corrosion rate is only one‑fifth that of the traditional process.

SY-132 aluminum mirror‑finish polishing agent (premium grade) is a colorless, viscous liquid that contains no lead, chlorinated paraffins, hexavalent chromium, or their compounds. It effectively removes oil and rust while delivering exceptional lubrication and abrasive performance. It restores metal surfaces to a luster surpassing the original finish without leaving any scratches or blemishes. This polishing fluid is specially formulated for use in vibratory finishing machines to process various aluminum alloys. When used in conjunction with polishing stones, it accelerates the removal of machining marks, burrs, and flash from workpiece surfaces, reduces surface damage caused by contact with the stones, and delivers outstanding results on the polished surfaces of aluminum alloys, stainless steel, copper, and other metals.

SY-131 aluminum mirror‑polishing compound (coarse) is a colorless, viscous liquid. When used with a polishing machine, it enables fine grinding and mirror‑finish polishing of aluminum alloy surfaces, enhancing polishing efficiency while removing surface oils and achieving an initial bright finish. It also provides rust protection, maintains luster, and offers lubrication to reduce abrasion, helping the workpiece attain an ideal level of gloss. It delivers comparable, outstanding results when applied to stainless steel, copper, and other metal surfaces. This product is non‑toxic, non‑oxidizing, and non‑flammable, with excellent detergency, anti‑rust properties, and cleaning performance. It can restore metals to a brighter finish than their original state, and its wastewater discharge complies with environmental regulations.

Conversion coating category: High‑wear‑resistant, sunlight‑resistant decorative oxide film Application area: Self‑lubricating black oxide coating for automotive sunroof slide rails Partner: All automotive friction components have this type of requirement Advantages of the conversion coating: Currently, we are in discussions with Changchun Hengtuo Group to supply a self‑lubricating black oxide coating for sunroof slide rails to the German‑owned Webasto company, which holds a 65% global market share in sunroofs. Samples are undergoing nine performance tests. Our oxide‑coating process is well‑established, and we are confident of securing this project; within the year, we plan to build a dedicated production line in Changchun with an annual capacity of 800,000 sets. Should SAIC have similar requirements, we would welcome the opportunity to collaborate.

Conversion coating type: high‑wear‑resistant, low‑roughness oxide film Application areas: valve bodies made of high‑silicon aluminum alloys Partners: automotive component manufacturers producing transmission housings, air‑conditioning pumps, brake pumps, and more Conversion coating advantages: Currently in production are ADC12 brake pump housings, automatic transmission valve bodies, and A390 swash plates for air‑conditioning pumps, all manufactured on a dedicated automated high‑silicon aluminum oxidation line. The challenge with this type of oxide coating lies in its stringent performance requirements, which exceed the capabilities of standard aluminum anodizing processes.

Conversion coating type: High-gloss, acid- and alkali-resistant anodized film Application areas: Roof rack bars, door trim strips Partners: Demand exists for four Kia models as well as comparable B‑segment vehicles Advantages of the conversion coating: In 2016, processed rack samples and a small batch of 300 units passed GM’s ten‑point performance tests, and all on-site process‑technology and production preparations were completed. However, the project was subsequently halted when DEEZEE, a U.S. company, canceled its investment plans in China.

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.

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.

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.

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.

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.

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.

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.

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.