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The study of linear correlation between surface roughness parameters and adhesion of flame sprayed coatings

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Języki publikacji
EN
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EN
Adhesion is one of the reasons for limiting the use of thermally sprayed coatings. Many factors influence the adhesion of thermally sprayed coatings, for example: quality of the workmanship of surface preparation, method of thermal spraying, processing parameters, and the temperature of the preliminary preheat substrate, properties of the substrate and coating materials. Another one is the surface roughness. Attempts are made to use surface roughness parameters (e.g. Ra, Rz, Rq, Rku, Rsk) for prediction of adhesion of thermally sprayed coatings. However, most often these attempts end in failure. This article discusses the task of assessing the linear correlation between the twelve parameters of roughness or material ratio of various surface profiles and strength bond of coatings. For analysis, the following parameters were selected: Rz, Ra, Rq, Rsk, Rt, RSm, Rp, Rv, Rku, Rmr (50%), Rk, Rpk, Rvk. The steel substrates (S185) were machined by abrasive machining. The surface roughness of the steel substrate ranged Rz = 1.89-5.34 mm. Nickel-based coatings were applied by flame spraying by the Casto Dyn DS 8000 torch. Adhesion of coatings was measured by pull – off method. The flame sprayed coatings were characterized by adhesion to the steel substrate in the range of from 5.53 MPa to 8.28 MPa. The highest value of the correlation coefficient (Pearson – R)between parameters Rp, Rpk, and adhesion of thermally sprayed coatings were found. The coefficient R was equalto the 0.83, and the coefficient of determination R2 = 0.7. The lowest value of the correlation coefficient was found for the Rku roughness parameter amounting to 0.37. In the measurements carried out, it can be concluded that the prediction of adhesion of the coatings according to the roughness of the substrate, should be carried out by use the parameters characterizing the peaks height of roughness profile.
Twórcy
  • Gdynia Maritime University, Department of Marine Maintenance Morska Street 81-87, 81-225 Gdynia, Poland tel.:+48 58 6901236, +48 58 6901249, fax: +48 58 6901399
autor
  • Gdynia Maritime University, Department of Marine Maintenance Morska Street 81-87, 81-225 Gdynia, Poland tel.:+48 58 6901236, +48 58 6901249, fax: +48 58 6901399
Bibliografia
  • [1] Begg, H., Riley, M., de Villiers Lovelock, H., Mechanization of the grit blasting process for thermal spray coating applications: a parameter study, Journal of Thermal Spray Technology, Vol. 25(1-2), pp.12-20, 2016. 228
  • [2] Bobzin, K., Ote, M., Linke, T. F., Sommer, J., Liao, X., Influence of process parameter on grit blasting as a pretreatment process for thermal spraying, Journal of Thermal Spray Technology, Vol. 25(1-2), pp. 3-11, 2016.
  • [3] Chen, Z., Zhou, K.,• Lu, X., Lam, Y. C., A review on the mechanical methods for evaluating coating adhesion, Acta Mechanica, Vol. 225, pp. 431-452, 2014.
  • [4] Charchalis, A., Starosta, R., Effect of finishing on the corrosion properties of flame sprayed Ni-5%Al and Ni-5%Al-Al2O3 coatings, Journal of KONES, Vol. 21(4), pp. 30-36, 2014.
  • [5] Hejwowski T. Nowoczesne powłoki nakładane cieplnie odporne na zużycie ścierne i erozyjne, Wydawnictwo Politechniki Lubelskiej, Lublin 2013.
  • [6] Krishnamurthy, N., Sharma, S.C., Murali, M.S., Mukunda, P.G., Adhesion behavior of plasma sprayed thermal barrier coatings on Al-6061 and cast iron substrates, Front. Mater. Sci. China, 3, pp. 333-338, 2009.
  • [7] Ichikawa, Y., Barradas, S., Borit, F., Guipont, V., Jeandin, M., Nivard, M., Berthe, L., Ogawa K., Shoji, T., Evaluation of adhesive strength of thermal-sprayed hydroxyapatite coatings using the laser shock adhesion test (LASAT), Materials Transactions, Vol. 48, pp. 793-798, 2007.
  • [8] Matějíček, J., Vilémová, M., Mušálek, R., Sachr, P., Horník, J., The influence of interface characteristics on the adhesion/cohesion of plasma sprayed tungsten coatings, Coatings, Vol. 3, pp. 108-125, 2013.
  • [9] Nitkiewicz, Z., Wykorzystanie łukowych źródeł plazmy w inżynierii powierzchni, Wydawnictwo Politechniki Częstochowskiej, Częstochowa 2001.
  • [10] Paredes, R. S. C., Amico, S. C., d’Oliveira, A. S. C. M., The effect of roughness and preheating of the substrate on the morphology of aluminum coatings deposited by thermal spraying, Surface and Coatings Technology, Vol. 200, pp. 3049-3055, 2006.
  • [11] Patel, K., Doyle, C. S., Yonekura, D., James, B. J., Effect of surface roughness parameters on thermally sprayed PEEK coatings, Surface and Coatings Technology, Vol. 204, pp. 3567-3572 2010.
  • [12] Samson, T., MacDonald, D., Fernandez, R., Jodoin B., Effect of pulsed waterjet surface preparation on the adhesion strength of cold gas dynamic sprayed aluminum coatings,Journal of Thermal Spray Technology, Vol. 24, pp. 984-993, 2015.
  • [13] Starosta, R., Effect of burnishing on the contact fatigue of regenerative thermally sprayed coatings, Journal of KONES, Vol. 20 (1), pp. 309-315, 2013.
  • [14] Starosta, R., Podstawy wytwarzania i obróbki powłok kompozytowych w procesach regeneracji elementów maszyn i urządzeń eksploatowanych w środowisku wody morskiej.Wyd. Akademii Morskiej w Gdyni, Gdynia 2013.
  • [15] Wang, Y. Y., Li, C. J, Ohmori, A., Influence of substrate roughness on the bonding mechanisms of high velocity oxy-fuel sprayed coatings, Thin Solid Films, Vol. 485, pp. 141-147, 2005.
  • [16] Wielage, B., Grund, T., Rupprecht, C., Kuemmel, S., New method for producing power electronic circuit boards by cold-gas spraying and investigation of adhesion mechanisms, Surface and Coatings Technology, Vol. 205, pp. 1115-1118, 2010.
Uwagi
PL
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-06e72a91-aa7d-41cb-a610-1ed0aa856a19
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