We propose a new polyurethane primer with high adhesion for the protection of welded joints of main pipelines under the field conditions. For the investigation of the influence of filling of this primer by a mixture of modified zinc phosphate and calcite in the form of a finely divided marble powder on its anticorrosion and physicomechanical characteristics, we used contemporary methods of investigations: the electrochemical impedance spectroscopy and scanning electron microscopy. It is shown that the extract of marble powder blocks anodic reactions on the surface of 09G2S pipe steel. Together with zinc phosphate, it forms an efficient corrosion inhibitor of mixed type in weakly acid rain. It is shown that, under the influence of the extract of marble–zinc-phosphate inhibiting composition, the resistance to charge transfer becomes 5–10 times higher depending on the ratio of the modified phosphate to the filler and the time of holding. A stable protective film of complex phosphates forms on the metal surface. The procedure of filing of the polyurethane primer with the indicated mixture of inhibitors is promising in guaranteeing the stability of its adhesion in sections of welded joints and metal structures of the main pipelines.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
I. I. Mazur and O. M. Ivantsov, Safety of Pipeline Systems [in Russian], Nedra, Moscow (2005).
I. L. Rozenfel’d and F. I. Rubinshtein, Corrosion Protection of Metals by Paint Coatings [in Russian], Khimiya, Moscow (1987).
V. I. Pokhmurs’kyi, I. M. Zin’, I. P, Hnyp, et al., Polyurethane Primer Composition [in Ukrainian], Patent of Ukraine UА No. 42045, Publ. on 25.06.2009; Bull. No. 12.
V. I. Pokhmurs’kyi, I. M. Zin’, L. M. Bilyi, et al., Primer Composition [in Ukrainian], Patent of Ukraine UА No. 21292, Publ. on 15.03.2007, Bull. No. 3.
I. Pokhmurs’kyi, I. M. Zin’, L. M. Bilyi, et al., “Inhibited coatings based on polyurethane for problem sections of main pipelines,” in: Problems of the Service Life and Operating Safety of Structures, Buildings, and Machines [in Ukrainian], Paton Institute of Electric Welding, Kyiv (2009), pp. 144–148.
A. Kalendova, “Comparison of the efficiencies of anticorrosive pigments based on phosphate,” Pigm. Resin Technol., 31, No. 6, 381–388 (2002).
G. W. Walter, “A review of impedance plot methods used for corrosion performance analysis of painted metals,” Corr. Sci., 26, No. 9, 681–703 (1986).
S. R. Taylor, “Assessing the moisture barrier properties of polymeric coatings using electrical and electrochemical methods,” IEEE Trans. Electr. Insul., 24, No. 5, 787–806 (1989).
I. L. Rozenfel’d and F. I. Rubinshtein, Corrosion-Resistant Prime Coatings and Inhibited Paint Coatings [in Russian], Khimiya, Moscow (1980).
ISO 6270-2:2005, Paints and Varnishes. Evaluation of the Moisture Resistance, Published on 30.06.2005.
P. A. Schweitzer, Corrosion of Linings and Coatings. Cathodic and Inhibitor Protection and Corrosion Monitoring, Marcel Dekker, New York (2001).
The present work was performed under the financial support of the “Resurs” Complex Program of Scientific Research of the Ukrainian National Academy of Sciences “Problems of Service Life and Operating Safety of Structures, Buildings, and Machines,” Project No. 3.5 “Development of a Polyurethane Primer with High Adhesion for the Protection of Welded Joints of the Main Pipelines under the Field Conditions.”
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 49, No. 3, pp. 7–16, May–June, 2013.
Rights and permissions
About this article
Cite this article
Pokhmurs’kyi, V.І., Bilyi, L.M. & Zin’, Y.І. Corrosion-Resistant Inhibited Coatings for Welded Joints of Pipelines. Mater Sci 49, 281–291 (2013). https://doi.org/10.1007/s11003-013-9612-4
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11003-013-9612-4