经常拆装钢紧固件区域腐蚀防护改进

Corrosion Prevention Improvement on the Area of Frequently Dismounting Steel Fastener

目的提升经常拆装的钢紧固件区域的腐蚀防护水平。方法通过盐雾试验考察经常拆装对钢紧固件区域腐蚀的影响。制定改进方案,并通过加速腐蚀试验进行验证。结果经常拆装对紧固件区域防护层会产生明显破坏作用,通过更换紧固件表面处理方式、孔壁防护、装配密封和喷涂缓蚀剂等措施可明显提升腐蚀防护水平。结论采用腐蚀防护改进方案可有效解决经常拆装的钢紧固件区域的腐蚀问题,可在飞机制造和使用维护中推广应用。

Objective To improve the corrosion prevention level of the frequently dismounting area of steel fastener. Methods The salt fog test was used to review the impact on the frequently dismounting steel fastener area.The improving scheme was established, which was validated by accelerated corrosion test. Results The frequently dismounting and assembly had significant breakage effect on the defense coatings of the fastener area. Corrosion prevention level was markedly improved by replacement of surface treatment approaches, fastener hole wall prevention,assembly seal and application of corrosion inhibitor. Conclusion Corrosion protection measures can effectively solve the corrosion problem in the frequently dismounting area of steel fastener,which could be popularized in aircraft manufacture and maintenance.