Abstract
It is difficult for small rudder or wing with metal hollow construction to resist rain water, moisture, and salt fog, resulting in higher weight, barycenter departure, poor maneuverability, and stress due to repeating icing and evaporating. It also lead corrosion and other failures. Sealing with sealants or in situ foaming is simple and effective engineer measure. This article investigates water seepage prevention method, chooses and compares different sealants, as well as surface treatment, structures to improve adhesion performance, heat resistance, environment suitability, ageing resistance.
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