BY-47 aluminum green film chromizing agentThere are many types of chemical conversion coatings of aluminum and its alloys, of which are typically chromate, phosphorous-chromate, tannic acid, and phosphate membranes. Among them, the chromate-phosphate film is relatively thick and has good corrosion resistance. In response to the market demand for aluminum products, the adhesion is strong, the corrosion resistance is good, and the cost is low. This product has been specially developed.