Experimental Study of Drag Resistance Using a Laboratory Scale Rotary Set-up

• Published in: Biofouling (Chur, Switzerland) Vol. 19; no. sup1; pp. 45 - 51
• Main Authors: Weinell, Claus E, Olsen, Kenneth N, Christoffersen, Martin W, Kiil, Søren
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Abingdon Taylor & Francis Group 01.04.2003; Taylor and Francis
• Subjects: Antifouling Paint; Applied sciences; Coatings. Paints, varnishes and inks; Drag Resistance; Exact sciences and technology; Film formation and curing, properties, testing; Friction; Materials Testing; Paint; Polymer industry, paints, wood; Rotary Set-up; Roughness; Seawater; Ship Hull Irregularities; Ships; Silicone Paint; Surface Properties; drag resistance; rotary set-up; ship hull irregularities; Coating material; Drag; Roughness; Antifouling paint; Mechanical properties; Paint film; Ship; Experimental study; silicone paint
• ISSN: 0892-7014; 1029-2454
• DOI: 10.1080/0892701031000072118

This work covers an experimental study of the drag resistance of different painted surfaces and simulated large-scale irregularities, viz. dry spraying, weld seams, barnacle fouling and paint remains. A laboratory scale rotary set-up was used to determine the drag resistance, and the surface roughness of the samples was determined by means of two different stylus-based methods, one having a 1.6 mm ball stylus (giving the macro-roughness) and the other having a needle type stylus (giving the micro-roughness). It is demonstrated that, in the case of ideal painted surfaces (low macro-roughness), the micro-roughness is much more important than the macro-roughness. On the other hand, the study also indicates that larger scale irregularities have a much greater influence on the drag resistance compared to measurements of the paint system alone.