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Hamburg, Germany

Momber A.,Muehlhan AG
EUROCORR 2013 - European Corrosion Congress | Year: 2013

The paper provides a review about the corrosion and corrosion protection of offshore wind energy devices (OWEA) with a focus on the support structure. Considered are tower structures and power transmission platforms. Firstly, special features resulting from location and operation of wind energy devices offshore are being discussed. This includes the definition of a load collective. Secondly, types of corrosion and corrosion phenomena as well as coating deterioration issues are summarized in a systematic way. Examples form site inspections are presented. Further, practical solutions to the corrosion protection of OWEA with a focus on the application of protective coating and lining systems, either organic or metallic, are discussed. Crucial issues, namely steel work quality, steel surface preparation, paint application and quality control, are discussed finally from a point of view of a surface protection contractor. Source


Momber A.W.,Muehlhan AG
International Journal of Advanced Manufacturing Technology | Year: 2016

The paper reports about investigations into the removal of thick organic protective coatings with rotating high-speed water jets. Ten nozzle carriers, rotating at a very high speed of 3000 min1, were applied at stand-off distances between 10 and 82 mm. Widths of the eroded sections and the percentage of completely exposed steel sections were estimated. Color-based image processing was applied for the assessment of exposed steel sections. The results reveal two types of performance. (i) Carriers with a moderate number of nozzles travelling on more than one orbit exhibit a maximum performance at characteristic optimum stand-off distances. (ii) Carriers with nozzles travelling on one orbit perform best at the lowest stand-off distance; these configurations generate notable swirl pattern (lack of overlap) in the center of the erosion path. The most effective configuration is characterized through an optimum balance between nozzle number, nozzle diameter, and nozzle orbit for a given stand-off distance. © 2016 Springer-Verlag London Source


Momber A.,Muehlhan AG
Materials and Corrosion | Year: 2012

The paper reviews the utilization of colour analyses for the assessment and rating of atmospheric corrosion products, whereas particular attention is spent to flash rusting. The background of flash rust formation is discussed first, along with a brief review about the composition of flash rust. The fundamentals of the HSV colour model, which is selected as a simple suitable model, are introduced. Finally, the author discusses the utilization of the suggested approach for the evaluation of steel substrate cleanliness and rust assessment. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


The paper provides a review about the corrosion and corrosion protection of offshore wind energy devices (OWEA). Firstly, special features resulting from location and operation of OWEA are being discussed. Secondly, types of corrosion and corrosion phenomena are summarized in a systematic way. Finally, practical solutions to the corrosion protection of OWEA, including steel allowances, cathodic protection and coatings and linings, are discussed. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Momber A.W.,Muehlhan AG | Plagemann P.,Fraunhofer Institute for Manufacturing Engineering and Applied Materials Research | Stenzel V.,Fraunhofer Institute for Manufacturing Engineering and Applied Materials Research
International Journal of Adhesion and Adhesives | Year: 2016

Corrosion protection coating systems for offshore wind power constructions were subjected to offshore conditions on a test site in the North Sea. The systems included organic coatings and duplex (spray metal and organic system) coatings. Special exposure specimens were designed and manufactured and exposed to an offshore environment for three years in order to evaluate their protection performance. The adhesion in terms of pull-off strength and fracture mode was measured on coatings in the underwater zone and in the intermediate zone. All samples met the requirements for offshore ageing in terms of adhesion. An adhesion-based "corrosion protection effect" (CE) is introduced and calculated for the coating systems. © 2015 Elsevier Ltd. All rights reserved. Source

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