Common knowledge of coating: analysis of pretreatment technology for aluminum and aluminum alloy coating

It is suggested that chemical conversion coating treatment is the most widely used process in the anti-corrosion surface treatment of aluminum and aluminum alloy at present The development of more than half a century has made the chemical conversion coating process more and more mature, and other new treatment methods have been derived Undoubtedly, chemical oxidation treatment will still play an important role in the future However, due to the increasingly serious environmental pollution, higher requirements are put forward for the cleanness and pollution-free of the surface treatment process This can be improved from the following directions 1 Low temperature of metal surface treatment develops energy-saving surface treatment process 2 Low chromium and non chromium treatment 3 Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Coating home news: chemical conversion film treatment is the most widely used process in the anti-corrosion surface treatment of aluminum and aluminum alloy With the development of more than half a century, chemical conversion film technology is becoming more and more mature, and other new treatment methods are constantly derived Undoubtedly, chemical oxidation treatment will still play an important role in the future However, due to the increasingly serious environmental pollution, higher requirements are put forward for the cleanness and pollution-free of the surface treatment process This can be improved from the following directions 1 Low temperature of metal surface treatment develops energy-saving surface treatment process 2 Low chromium and non chromium treatment 3 Water free washing treatment: to cancel the washing process of the whole process can not only fundamentally solve the problem of environmental pollution caused by wastewater discharge, but also save water resources Japan report: chromic acid type surface treatment agent is a mixture of Cr3 +, Cr6 + and water-soluble organic resin It is applied to aluminum plate by spraying film-forming method, without washing, even if containing chromium ions, it will not pollute the environment; it is naturally dry, easy to close the system for treatment; the corrosion resistance and adhesion of the film are the same as or even better than the previous surface treatment 4 The pretreatment process and the film forming process adopt the mutual closed circulation mode All chemicals in the system can be recycled without changing the original solution, and only the consumed drugs need to be added regularly; water washing or non water washing can be closed The closed technological process can greatly improve the field working environment, reduce the discharge of waste residue and waste liquid, save energy and resources, and the economic and social environmental benefits are obvious Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,