SY-321 Aluminum Alloy Trivalent Chromium Passivation Agent

SY-321 trivalent chromium passivator for aluminum alloys is a clear green liquid based on trivalent chromium, with a density of 1.005 g/mL (range: 1.00–1.01 g/mL) and a pH close to 3.4. It serves as a post‑treatment solution for anodic oxide coatings on aluminum and aluminum alloys, and can also be used as a pretreatment step prior to painting, powder coating, or adhesive bonding. It forms a transparent, lightly colored, highly heat‑resistant inorganic passivation film whose corrosion‑protection performance surpasses that of hexavalent chromium passivation processes, even exceeding the corrosion‑resistance standards specified in MIL‑DTL‑81706 and MIL‑DTL‑5541 (as determined by neutral salt spray tests according to ASTM B‑117 and DIN EN ISO 9227, with initial white rust appearing only after more than 336 hours).

SY-320 Aluminum Alloy Chromating Agent

SY-320 aluminum alloy chromating agent is an orange or brown powder used as a primer for aluminum and aluminum alloy surfaces or to form a standalone coating. The resulting film exhibits a golden‑yellow color, with a thickness of approximately 5–10 μm, and offers excellent corrosion resistance and decorative appeal. In the bare‑metal condition, it withstands neutral salt spray testing for more than 96 hours. It also provides outstanding resistance to discoloration, and its chemically converted coating adheres strongly, significantly enhancing the bond between the substrate and subsequent coatings or paints. The process can be carried out at ambient or low temperatures, with simple operation and management; bath formulation and monitoring are straightforward, performance is stable, service life is long, and production efficiency is high, resulting in low overall costs.

SY-314 magenta colorant

SY-314 magenta colorant is a copper‑salt electrolytic coloring agent that offers corrosion resistance, lightfastness, abrasion resistance, and heat resistance—properties unmatched by conventional organic dyeing processes. It is widely used for decorative and protective finishing of aluminum surfaces and aluminum products. When applied after anodizing, this electrolytic colorant and its associated process yield hues ranging from flesh‑red to deep red, with rich, pure, and striking colors. The bath formulated with this colorant is easy to maintain, boasts a long service life, exhibits strong resistance to impurities, and offers excellent adjustability.

SY-312 Champagne Gold Colorant

SY-312 champagne‑gold colorant is a white powder used in the electrolytic coloring process following anodizing of aluminum profiles. It produces an electrolytically colored film with a light sandy yellow–beige hue, exhibiting excellent lightfastness and weather resistance. This product offers easy-to‑control processing for achieving yellow–beige shades, with minimal color variation; its wear resistance, corrosion resistance, and weatherability surpass those of standard champagne tones. However, to obtain a deeper champagne‑gold shade, a hole‑expansion treatment is required to ensure smooth production operations and superior post‑treatment sealing quality.

SY-311 Bronze Series Colorant

SY-311 bronze‑series colorant is a pale yellow powder composed of divalent tin salts, iron salts, and organic acids. It is used for electrolytic coloring of aluminum anodized coatings, enabling the production of electrolytically colored films ranging from light champagne to bronze and black. Additionally, it suppresses the oxidation of divalent tin to tetravalent tin caused by dissolved oxygen, thereby enhancing the dispersing capacity of the electrolytic coloring bath. This product contains stannous sulfate and stabilizers, simplifying the process of controlling the bath composition.

SY-313 gray colorant

SY-313 gray colorant is a gray‑white powder used for electrolytic coloring of anodized aluminum profiles, enabling the production of gray‑to‑dark gray and black electrolytic color films with uniform hue, excellent dispersibility and reproducibility, bright surface finish, and superior bath stability. Its component concentrations and ratios remain largely constant, ensuring long service life and no precipitate formation. The manufacturing process is easy to control, resulting in minimal color variation; its wear resistance, corrosion resistance, and weatherability outperform those of conventional gray colors, while also delivering outstanding gloss on the colored aluminum.

SY-302 Wide-Temperature Rapid Film-Forming Agent

SY-302 wide‑temperature rapid film‑forming agent is a colorless to pale blue liquid, suitable for sulfuric acid anodizing of aluminum and its alloys. Sulfuric acid anodizing baths containing this additive exhibit a faster film‑formation rate, reaching up to 1 µm/min, facilitating the production of thick oxide films while maintaining high process efficiency. Compared with conventional sulfuric acid anodizing, it can improve productivity by 20–40%. Moreover, it offers a broad operating temperature range: qualified oxide films can be obtained at temperatures below 30°C, with uniform thickness, enhanced hardness, and excellent sealing performance.

SY-301 Anodizing Agent

SY-301 anodizing additive is a white, powder‑form additive used in the anodizing of aluminum and aluminum alloys. It produces anodized films with a silvery‑white appearance and a fine, uniform surface texture. Additionally, it lowers sulfuric acid concentration, extending the service life of the anodizing bath, and tolerates an aluminum content of up to 28 g/L. It optimizes the electrical conductivity of the electrolyte, enhancing film‑formation efficiency—increasing the deposition rate from the conventional 0.33 μm/min to 0.8 μm/min—thereby reducing electrolysis time, saving energy, and broadening the operating temperature range, with a permissible operating temperature of up to 30°C.