Anodizing method improving protection performance of aluminum and aluminum alloy

• Main Authors: YU BO, WANG ZHISHEN, SUN ZHIHUA, WU SONGLIN, WANG QIANG, CHEN JIE, ZHU RUIXIN, YI JUNLAN, WU HONGLIANG, SONG YUANZENG, PENG CHAO, TANG ZHIHUI, DING JIANGANG
• Format: Patent
• Language: Chinese; English
• Published: 06.04.2016
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS

The invention provides an anodizing method improving protection performance of aluminum and aluminum alloy. An anodizing solution is formed by mixing at least one of inorganic salt of sulfuric acid, sodium borate, malic acid and cerium and water according to the proportion. A voltage control manner is adopted in anodizing for anodizing treatment on aluminum or aluminum alloy materials. An anodized film layer prepared through the method is good in corrosion resistance, good in combining performance with an organic paint film and low in fatigue performance on a base body and has the beneficial effects of being simple in technology, stable in performance, high in film forming efficiency and small in environment pollution. Organic-inorganic hybrid chromium-free closing method is selected after anodizing, chromium and other poisonous and harmful substances are not contained in confining liquid completely, and waste liquid discharging does not exist in the sealing process. The sealed anodized film layer is good in