Fan Lina*,Zhang Xiaolin,Chen Feng,et al.Analysis of environmental protection alternative process of chromic acid anodizing for aluminum alloy in aviation field[J].Plating & Finishing,2023,(8):81-86.[doi:10.3969/j.issn.1001-3849.2023.08.013]
铝合金铬酸阳极化在航空领域的环保替代工艺分析
- Title:
- Analysis of environmental protection alternative process of chromic acid anodizing for aluminum alloy in aviation field
- Keywords:
- aviation ; aluminum alloy ; anodizing ; environment protection
- 分类号:
- TQ174.4
- 文献标志码:
- A
- 摘要:
- 铝合金阳极氧化工艺是航空领域广泛应用的腐蚀防护工艺，为了解决传统铝合金铬酸阳极化六价铬污染等问题，从工艺要求、膜层性能、设备设施要求、废液处理等方面对铬酸阳极化、硫酸阳极化、硼硫酸阳极化和酒石酸阳极化 4 种工艺进行了对比分析，研究替代工艺。研究发现硫酸阳极化工艺的电解液配制、分析和维护相对简单，硼硫酸阳极化对杂质和清洗水控制要求与铬酸阳极化基本一致，酒石酸阳极化的要求最严。 4 种工艺氧化膜均可满足耐腐蚀性要求，但硫酸阳极化会降低铝合金的疲劳性能，硼硫酸阳极化和酒石酸阳极化的综合性能与铬酸阳极化相当。酒石酸阳极化的槽体设备要求高于其他 3 种工艺。铬酸阳极化废水、废液处理要求和成本最高，硼硫酸阳极化工艺的综合成本最低。综合分析结果表明，硼硫酸阳极化是代替铬酸阳极化的最佳铝合金阳极氧化工艺。
- Abstract:
- ： The aluminum alloy anodizing is widely used in the aviation field for corrosion protection. To solve the problems of Cr 6+ pollution of chromic acid anodizing ， chromic acid anodizing ， sulfuric acid anodizing ， boric-sulfuric acid anodizing and tartaric-sulfuric acid anodizing were compared and analyzed to find an environmental protection alternative process. The process parameter requirements ， film performance ， equipment and facilities requirements and treatment of waste of the four processes were studied. It is found that the preparation ， analysis and maintenance of the sulfuric acid anodizing solution are simple. The process control requirements for impurities and cleaning water of the boric-sulfuric acid anodizing process are mostly the same as those of the chromic acid anodizing process ， but the requirements of tartaric-sulfuric acid anodizing are the strictest. The coating performances of the four processes can meet the requirements of the corrosion resistance ， but sulfuric acid anodizing reduces the fatigue performance of aluminum alloy. The comprehensive performance of boric-sulfuric acid anodizing and tartaric-sulfuric acid anodizing is equivalent to that of chromic acid anodizing. The tank equipment requirements of tartaric acid anodizing tank are higher than those of the other three processes. The treatment requirements and cost of chromic acid anodizing wastewater are the highest ， and the comprehensive cost of boron-sulfuric acid anodizing process is the lowest. The results show that the boric-sulfuric acid anodizing is the best process to replace the chromic acid anodizing for aluminum alloy.
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备注/Memo
收稿日期： 2023-01-04 修回日期： 2023-01-30 * 通信作者： 范丽娜（ 1987 ―），女，研究生，工程师， email ： hghm2004@126.com 铝合金铬酸阳极化在航空领域的环保替代工艺分析 范丽娜 * ，张晓林，陈 锋，姜启涛，李克强 （中航成飞民用飞机有限责任公司，四川 成都 610092 ）