Preparation and characterization of anticorrosion polyurethane paints and coatings based on novel Zn-free phosphates
Tóm tắt
Novel aluminum ammonium phosphates (AAP) were tested as anticorrosion fillers in two-component solventborne polyurethane paints. Their properties were compared with microsized aluminum zinc phosphate (AZP) as well as with nanosized (nAP) and microsized (AP) aluminum phosphates. Generally, coating compositions containing AAP exhibited similar or slightly higher viscosity than the systems with AZP and AP. Moreover, cured polyurethane coats with AAP reached higher gloss and better adhesion to a steel substrate. The results of salt spray tests (2500 h) showed that anticorrosive properties of coats containing 10 wt% of AAP were similar or better than those noted for coats with 15.6 wt% of AZP or 13.7 wt% of AP. Electrochemical impedance spectroscopic tests revealed markedly higher barrier properties of coats with AAP in comparison to an AP-based sample.
Tài liệu tham khảo
Deyá, C, Blustein, G, del Amo, B, Romagnoli, R, “Evaluation of Eco-friendly Anticorrosive Pigments for Paints in Service Conditions.” Prog. Org. Coat., 69 1–6 (2010)
Hamdy, A, “A Clean Low Cost Anti-corrosion Molybdate Based Nano-particles Coating for Aluminum Alloys.” Prog. Org. Coat., 56 146–150 (2006)
Spychaj, T, Spychaj, S, Water-Thinnable Paints and Adhesives. WNT, Warsaw, 1996
Kalendova, A, Kalenda, P, Veselý, D, “Comparison of the Efficiency of Inorganic Nonmetal Pigments with Zinc Powder in Anticorrosion Paints.” Prog. Org. Coat., 57 1–10 (2006)
Śmieszek, E, Kamińska, E, Ochrona Przed Korozją (Corros Protect), 4 85–88 (1996)
Abd El-Ghaffar, M, Youssef, E, Ahmed, N, “High Performance Anticorrosive Paint Formulations Based on Phosphate Pigments.” Pigment. Resin. Technol., 33 226–237 (2004)
Blustein, G, Dayá, M, Romagnoli, R, del Amo, B, “Three Generations of Inorganic Phosphates in Solvent and Water-Borne Paints: A Synergism Case.” Appl. Surf. Sci., 252 1386–1397 (2005)
Kalendova, A, Veselý, D, Kalenda, P, “A Study of the Effects of Pigments and Fillers on the Properties of Anticorrosive Paints.” Pigment. Resin. Technol., 35 83–94 (2006)
Naderi, R, Attar, M, “Electrochemical Assessing Corrosion Inhibiting Effects of Zinc Aluminum Polyphosphate (ZAPP) as a Modified Zinc Phosphate Pigment.” Electrochim. Acta, 53 5692–5696 (2008)
de Lima-Neto, P, de Araújo, A, Araújo, W, Correia, A, “Study of the Anticorrosive Behaviour of Epoxy Binders Containing Non-toxic Inorganic Corrosion Inhibitor Pigments.” Prog. Org. Coat., 62 344–350 (2008)
del Amo, B, Romagnoli, R, Deyá, C, González, J, “High Performance Water-Based Paints with Non-toxic Anticorrosive Pigments.” Prog. Org. Coat., 45 389–397 (2002)
Galliano, F, Landolt, D, “Evaluation of Corrosion Protection Properties of Additives for Waterborne Epoxy Coatings on Steel.” Prog. Org. Coat., 44 217–225 (2002)
Hernández, M, Genescá, J, Uruchurtu, J, Galliano, F, Landolt, D, “Effect of an Inhibitive Pigment Zinc–Aluminum–Phosphate (ZAP) on the Corrosion Mechanisms of Steel in Waterborne Coatings.” Prog. Org. Coat., 56 199–206 (2006)
Naderi, R, Attar, M, “The Role of Zinc Aluminum Phosphate Anticorrosive Pigment in Protective Performance and Cathodic Disbondment of Epoxy Coating.” Corros. Sci., 52 1291–1296 (2010)
Naderi, R, Attar, M, “Electrochemical Study of Protective Behavior of Organic Coating Pigmented with Zinc Aluminum Polyphosphate as a Modified Zinc Phosphate at Different Pigment Volume Concentrations.” Prog. Org. Coat., 66 314–320 (2009)
Kowalczyk, K, Łuczka, K, Grzmil, B, Spychaj, T, “Anticorrosive Polyurethane Paints with Nano- and Microsized Phosphates.” Prog. Org. Coat., 74 151–157 (2012)
Kowalczyk, K, Łuczka, K, Grzmil, B, Spychaj, T, “Anticorrosive 2K Polyurethane Paints Based on Nano- and Microphosphates with High Dispersing Additive Content.” Prog. Org. Coat., 76 1088–1094 (2013)
Gawri, S, Balakrishnan, K, “The Effect of the PVC/CPVC Ratio on the Corrosion Resistance Properties of Organic Coatings.” Prog. Org. Coat., 23 363–377 (1994)
Minczewski, J, Marczenko, Z, Analytical Chemistry (Part 2). PWN, Warsaw, 2005
Orion Ammonia Electrode, Instruction manual, Thermo Electron Corporation, 2003
Murray, J, “Electrochemical Test Methods for Evaluating Organic Coatings on Metals: An Update. Part III: Multiple Test Parameter Measurements.” Prog. Org. Coat., 31 375–391 (1997)
Kic, B, Grzmil, B, Lubkowski, K, “Preparation of Nanocrystalline Aluminium Phosphate as an Anticorrosive Pigment.” Przem. Chem., 88 468–471 (2009)
Pourbaix, M, Leçons en Corrosion Electrochimique. PWN, Warsaw, 1978
Bethencourt, M, Botana, F, Marcos, M, Osuna, R, Sanchez-Amaya, J, “Inhibitor Properties of “Green” Pigments for Paints.” Prog. Org. Coat., 46 280–287 (2003)
Jaskova, V, Kalendova, A, “Anticorrosive Coatings Containing Modified Phosphates.” Prog. Org. Coat., 75 328–334 (2012)
Amirudin, A, Barreau, C, Hellouin, R, Thierry, D, “Evaluation of Anti-corrosive Pigments by Pigment Extract Studies, Atmospheric Exposure and Electrochemical Impedance Spectroscopy.” Prog. Org. Coat., 25 339–355 (1995)
Uhlig, H, Corrosion and Corrosion Control. WNT, Warsaw, 1976
Hernandez, M, Galliano, F, Landolt, F, “Mechanism of Cathodic Delamination Control of Zinc–Aluminum Phosphate Pigment in Waterborne Coatings.” Corros. Sci., 46 2280–2300 (2004)
Hao, Y, Liu, F, Han, E-H, Anjum, S, Xu, G, “The Mechanism of Inhibition by Zinc Phosphate in an Epoxy Coating.” Corros. Sci., 69 77–86 (2013)