Hamamatsu, Japan
Hamamatsu, Japan

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Kakiuchida H.,Japan National Institute of Advanced Industrial Science and Technology | Tajiri K.,Japan National Institute of Advanced Industrial Science and Technology | Tazawa M.,Japan National Institute of Advanced Industrial Science and Technology | Yoshimura K.,Japan National Institute of Advanced Industrial Science and Technology | And 7 more authors.
Applied Thermal Engineering | Year: 2015

Meso-scale (micrometer-to submillimeter-scale) wrinkled surfaces coated on steel sheets used in outdoor storage and transport facilities for industrial low-temperature liquids were discovered to efficiently increase convective heat transfer between ambient air and the surface. The radiative and convective heat transfer coefficients of various wrinkled surfaces, which were formed by coating steel sheets with several types of shrinkable paints, were examined. The convective heat transfer coefficient of a surface colder than ambient air monotonically changed with average height difference and interval distance of the wrinkle undulation, where the proportions were 0.0254 and 0.0054 W/m2/K/μm, respectively. With this wrinkled coating, users can lower the possibility of condensation and reduce rust and maintenance cost of facilities for industrial low-temperature liquids. From the point of view of manufacturers, this coating method can be easily adapted to conventional manufacturing processes. © 2015 Elsevier Ltd.


Patent
Koyo Engineering Co. and MEISEI INDUSTRIAL COMPANY Ltd | Date: 2014-01-27

It is provided a steel with composite plating film providing rust prevention over a long time period and a method of manufacturing thereof. A composite plating film 24 is formed on a metal material 21. The film 24 has a plating film 23 made of a sacrificial anode metal and photocatalyst particles 22 dispersed and fixed in the plating film 23. The photocatalyst particle has a main body composed of a photocatalyst and a semiconductor material supported thereon. The composite plating film 24 is formed on the surface of the metal material 21 by electroplating, hot-dipping, chemical plating or the like.

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