Enclosed low aluminum closed at room temperature or cold, also known as closed, the aluminum industry in recent years, the most widely used method of closure. It uses a low temperature closed Ni. F solution system, the reaction mechanism is very complex, aluminum products factory in Shenzhen, but closed with a metal salt hydrolysis method has some similarities, aluminum products, the presence of Al: hydration 03 and Ni (OH): Dual precipitation effect, Zhanjiang aluminum products processing plants, but due to the closure of F a reaction can be achieved at low temperatures. Low temperature blocking solution follows the basic formula and process specifications: Ni2 + content / (g / L) 1.O ~ 1.8F a content / (g / L) 0.3 ~ 0.8pH value of 5.5 to 6.5 temperature / ℃ 25 ~ 35 times every 1 / μm thick oxide film about 1min aluminum products people want to research trial does not produce "Dragon" chromium-free chemical polishing and electrolytic polishing process. Zhejiang Huangyan fluorescent chemical plant production of "aluminum-cured tobacco-free chemical polishing additive WXP", with the assistance of the environmental protection department in Beijing passed the appraisal. WXP additive system for phosphoric acid, sulfuric shiny polishing agent solution, and both inhibit the action of acid mist. The process recipe is used: commercially pure phosphoric acid (specific gravity d = 1.7) 800 ml / liter; industrial grade sulfuric acid (specific gravity d = 1.84) 200 ml / liter; WXP of 2 ml / liter; temperature 95 ~ 120 ℃. The new distribution solution should be added to 3 grams per liter of aluminum. Because this recipe does not contain nitric acid, so they do not have a "Dragon" nuisance polishing; suppressing acid mist with good results. Yangjiang aluminum products processing plants | Hong Run (Online) | aluminum products offered by Dongguan Shijie Hongrun metal products factory. Hongrun Dongguan Shijie Hardware Products Factory (dghrwj1688.1688.com) is Dongguan, hardware accessories leader over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Hongrun leadership with the staff warmly welcome all inquiries negotiations to create a better future for Hong Run.