Properties of High Pressure Water Hydraulic Components with Modern Coatings

Abstract:

Water hydraulics is coming back as an alternative to oil and other not environment friendly working fluids used in a very wide range of fluid drive and control systems. The cost of water resistant materials for components is one of the barriers preventing the wide use of water hydraulics, especially moving parts such as pump pistons, surface of cylinder tubes and rods, poppet and seats, etc. to avoid corrosion. One of the common solutions is to use stainless steel there, where it can cooperate with other nonmetallic material such as plastic or other noncorrosive metallic composite to reduce friction. Thus some of research was directed to elaboration of special coating for covering surfaces in critical regions of water hydraulic components. The paper describes results of pilot research on selected components where such coating were introduced on regular carbon steel parts, same as used for oil hydraulics. First part of the article contents description of coating technology and some characteristics of coating layers. Second quotes selected results of conducted by authors research on coated hydraulic cylinders and poppet valves.

• Periodical: Advanced Materials Research (Volume 849)
• Pages: 100-107
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.849.100
• Online since: November 2013
• Authors: Janusz Pobędza*, Andrzej Sobczyk
• Keywords: Coating, Hydraulic Cylinders, Poppet Valves, Water Hydraulic

References

[1] E. Trostmann, Water hydraulics control technology, Marcel Dekker inc., New York (1996).

[2] A. Sobczyk, in: Water Hydraulics. The Natural Choice, edited by Mads Grahl Madsen, Bergen University College, Norway, 2004, ISBN 82-7709-071-4, pp.34-67.

[3] F. Conrad, J. Pobedza, A. Sobczyk: IT-Tools Concept for Simulation and Design of Water Hydraulic Mechatronic Test Facilities for Motion Control and Operation in Environmentally Sensitive Application Areas, Paper no. IMECE2004-62411 pp.277-285.

DOI: 10.1115/imece2004-62411

[4] A. Sobczyk: Improvement of hydraulic system efficiency by means of energy recuperation, monograph, Cracow University of Technology Publication, ISSN 0860-097X, Krakow, (2011).

[5] Information on http: /www. hydrocoat. eu.

[6] F. Zhao, S. Franz, A. Vicenzo, P.L. Cavallotti, M. Sansotera, W. Navarrini, Electrodeposition of nanostructured columnar cobalt for self-lubricant coatings, Electrochimica Acta (2011).

DOI: 10.1016/j.electacta.2011.06.033

[7] A. Gawlik, J. Pobędza, A. Sobczyk, P. Walczak, in: Selected problems of heavy duty machinery, in Polish edited by A. Muc, Krakow, 2011, pp.33-49.

[8] A. Gawlik, J. Pobędza, A. Sobczyk, P. Walczak, Tests of directional poppet valves with DLC and CNC coatings for water hydraulic, International Scientific – Technical Conference: Hydraulics and Pneumatics, Wroclaw 2012, p.519 – 531.