A Study of Frictional Resistance of Some Coated Surfaces in Water

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  • 塗膜状態による水中摩擦抵抗に関する研究
  • トマク ジョウタイ ニ ヨル スイチュウ マサツ テイコウ ニ カンスル ケンキュウ

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It is well known that the frictional resistance of ships increases remarkably when the surface conditions are changed by marine growth attached to ship's bottom or due to other causes. However it has not been quantitatively studied yet how great their effects on friction resistance are. Hence, with the aim to clarify these effects on friction, several painted surfaces are tested by a rotating disk method and the frictional resistance is measured as a from of torque. It is found that coating films which are not sufficiently dried or to which marine growth attached increase frictional resistance, but small blisterings or peelings of coating films scarcely increase it.

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