離岸風機水下基礎塗裝耐蝕性及耐海水沖蝕性研究

Study on the seawater corrosion and erosion resistance of paintings used for the foundation structure of offshore wind turbine

本研究依據指定三種塗料（A、B、C）進行評估試驗，使用冷熱交變試驗與沖蝕試驗模擬台灣氣候、海浪沖擊對離岸風機基礎塗層的影響，並配合紫外光加速老化試驗（QUV）及衝擊測試以瞭解塗層的附著性及耐撞擊能力。研究結果顯示，以A塗料採用防蝕帶其腐蝕最為嚴重，受到水流沖蝕以及冷熱交變，導致外部包覆材料之璃纖維及樹酯明顯變薄，內部形成包覆層下的腐蝕；其次為B塗料採用無溶劑型環氧樹脂漆，切割時塗層容易龜裂，可能原因塗層與底材金屬附著力不佳，受到衝擊測試試片上塗層有龜裂行為；C塗料採用聚尿，經測試，為三者腐蝕損傷影響最小。

Three different designated paintings (A, B, C) were employed in the experimental evaluation of their corrosion and erosion resistances in seawater. Both temperature alternation and erosion were considered to simulate the climate and wave impact on the foundation structure of offshore wind turbine in Taiwan. Moreover, QUV accelerated weathering test and impact test were conducted to study the adhesion and impact property of the paintings. The results showed the most serious corrosion occurred for the A painting which was a tapecoat. The water erosion and temperature alternation caused the quick thinning of outer fiberglass/resin wrap material and subsequently the corrosion of underneath substrate. The next serious corrosion happened to the B painting which was a solvent-free epoxy resin. The brittleness of the coating and its inferior adhesion with substrate easily induced cracking when subjected to impact loading. The C painting which consisted of mainly carbamide resin showed the least damage from the experimental testing.