The Investigation of Performance Properties of the Epoxy/Glass Flake Composite Coating on Steel Pile Pipes

Yıl 2022, , 1 - 7, 30.12.2022

Gökhan Çil , Mahmut Gel

https://doi.org/10.52795/mateca.1193296

Öz

Steel pile pipes used for offshore applications and port construction are subject to high levels of corrosion. To protect the top end of the steel pile pipe against aggressive corrosion conditions, the splash zone of the steel pile pipe is coated with epoxy. For a high strength offshore system applications, the requirement of the long term durability of coating was specified as C5 (H) Im2 according to ISO 12944. The coated specimens with glass flake reinforced epoxy were exposed to neutral salt spray (NSS) for 1440 hours according to EN ISO 9227 and examined adhesion strength of the coatings. The corrosion and adhesion results of the samples which are coated in single and 2 layers with a dry film thickness of 600 microns, were found to be suitable and the painting operation was applied on the pipe to specify application condition. When the application results were examined, it was seen that the sample with a dry film thickness of 600 microns, coated in 2 layers, met the desired requirements.

Anahtar Kelimeler

Steel pile pipe, Corrosion, Splash zone, Glass flake epoxy

Çelik Kazık Borular Üzerindeki Cam Pulcuk Takviyeli Epoksi Kompozit Kaplamanın Performans Özelliklerinin Araştırılması

Öz

Açık deniz uygulamaları ve liman inşaasında kullanılan çelik kazık boruları yüksek düzeyde korozyona maruz kalır. Çelik kazık borunun üst ucunu saldırgan korozyon koşullarına karşı korumak için çelik kazık borusunun sıçrama bölgesi epoksi ile kaplanmıştır. Yüksek mukavemetli açık deniz sistem uygulamaları için, kaplamanın uzun süreli dayanıklılık şartı ISO 12944'e göre C5 (H) Im2 olarak belirtilmiştir. Cam pulcuk takviyeli epoksi ile kaplanmış numuneler 1440 saat boyunca EN ISO 9227'ye göre nötr tuz spreyine (NSS) maruz bırakılmış ve kaplamaların yapışma mukavemeti incelenmiştir. Korozyon ve yapışma test sonuçları uygun bulunan tek kat ve iki katlı 600 mikron kuru film kalınlığına sahip boyama sistemi ile uygulama koşullarının belirlenmesi için boru üzerine boyama uygulaması yapılmıştır. Uygulama sonuçları incelendiğinde 600 mikron kuru film kalınlığına sahip ve 2 katta kaplanmış numunenin istenilen şartları sağladığı görülmüştür.

Anahtar Kelimeler

Çelik kazık boru, Korozyon, Sıçrantı bölgesi, Cam pulcuk takviyeli epoksi

Destekleyen Kurum

Erciyas Çelik Boru A.Ş.

Kaynakça

• V. Uotinen, J. Rantala, Applications and development of modern steel pile technology, Procedia Engineering, 57: 1173-1182, 2013.
• F. Yu, J. Yang, M. Asce, Base capacity of open-ended steel pipe piles in sand, Journal of Geotechnical and Geoenvironmental Engineering, 138(9): 1116-1129, 2012.
• H. G. Kempfert, B. Gebreselassie, Chapter 6 - Pile foundation, Excavations and Foundations in Soft Soils, 1st Ed., Springer-Verlag, Berlin, Germany, 2006.
• K. Zen, Corrosion and life cycle management of port structures, Corrosion Science, 47(10): 2353–2360, 2005.
• A. Ul-Hamid, H. Saricimen, A. Quddus, A.I. Mohammed, L.M. Al-Hems, Corrosion study of SS304 and SS316 alloys in atmospheric, underground and seawater splash zone in the arabian gulf, Corrosion Engineering, Science and Technology, 52(2): 134–140, 2017.
• S. Sathiyanarayanan, S. S. Azim, G. Venkatachari, Corrosion protection coating containing polyaniline glass flake composite for steel, Electrochimica Acta, 53(5): 2087–2094, 2008.
• J. González-Guzmán, J.J. Santana, S. González and R.M. Souto, Resistance of metallic substrates protected by an organic coating containing glass flakes, Progress in Organic Coatings, 68(3): 240–243, 2010.
• H. Alhumade, R.P. Nogueira, A. Yu, A. Elkamel, L. Simon, A. Abdala, Role of surface functionalization on corrosion resistance and thermal stability of epoxy/glass flake composite coating on cold rolled steel, Progress in Organic Coatings, 122: 180–188, 2018.
• E.D. Kiosidou, A. Karantonis, G.N. Sakalis, D.I. Pantelis, Electrochemical impedance spectroscopy of scribed coated steel after salt spray testing, Corrosion Science, 137: 127-150, 2018.
• S. L. Esfahani, Z. Ranjbar and S. Rastegar, Comparison of corrosion protection of normal and galvanised steel coated by cathodic electrocoatings using EIS and salt spray tests, Corrosion Engineering, Science and Technology, 51(2): 82-89, 2016.
• ISO 9227, Corrosion tests in artificial atmospheres – Salt spray tests, 4. Edition, 2017.
• ISO 12944-6, Paints and varnishes – Corrosion protection of steel structures by protective paint systems – Part 6. Laboratory performance test methods, 2. Edition, 2018.
• ISO 4628-1, Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 1: General introduction and designation system, 2. Edition, 2016.
• E. Altuncu, G. ÇİL, M. GEL, Testing and characterization of FBE coatings against corrosion of spiral welded steel pipes, El-Cezeri Journal of Science and Engineering, 7(2): 679-689, 2020.
• J. P. B. V. Dam, S.T. Abrahami, A.Yilmaz, Y. Gonzalez-Garcia, H. Terryn, J.M.C. Mol, Effect of surface roughness and chemistry on the adhesion and durability of a steel-epoxy adhesive interface, International Journal of Adhesion & Adhesives, 96(2): 679-689, 2020.