Determination of the performance of epoxy coatings containing feldspars filler

Kouloumbi, N.; Ghivalos, L. G.; Pantazopoulou, P.

doi:10.1108/03699420510597992

Cited by 15 publications

(10 citation statements)

References 9 publications

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“…Extenders do not generally improve the anticorrosive performance of coatings, but certain extenders are reported to improve the specific properties of the coating. 6,156 Solvents Traditionally, solvents have constituted a major part of organic coatings. Solvents are added to coatings to dissolve or disperse the other constituents of the formulation (such as viscous polymeric binder material and pigments).…”

Section: Main Components In Anticorrosive Coatingsmentioning

confidence: 99%

“…5 One of the main reasons for the limited number of high performance anticorrosive coating systems is the complexity of the coating-substrate system and the number of factors affecting the performance and service life of anticorrosive coatings. Besides the composition of the coating, which consists of binders, pigments, solvents, extenders, and additives, 6 the performance and durability of anticorrosive coatings depends on several different parameters, such as type of substrate, pretreatment of substrate, curing, coating thickness, adhesion between the coating and substrate, as well as several external environmental parameters. [7][8][9][10][11] To perform its duty effectively, an anticorrosive coating must possess intrinsic durability, adhesion to the substrate, adequate flexibility, and toughness to withstand impacts and cracking as well as maintain its appearance when subjected to stress, swell, mechanical abuse, or weathering.…”

Section: Introductionmentioning

confidence: 99%

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Anticorrosive coatings: a review

et al. 2009

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Section: Main Components In Anticorrosive Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anticorrosive coatings: a review

et al. 2009

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“…Figure 4 displayed shock strength results of three cured composites. Measured shock strength could be ordered as silica loaded sample > SiC loaded one > alumina loaded one, ascribed to promotion of Moh's hardness of fillers in that order 19 . Filler with low hardness could give rise to high deformation ability of filler, leading to strong shock-energy absorption of filler during shock measurement of cured composite 20 .…”

Section: Resultsmentioning

confidence: 94%

High-performance ceramic/epoxy composite adhesives enabled by rational ceramic bandgaps

2020

Sci Rep

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High over-all properties, including low dielectric loss, high breakdown strength, high mechanical shock strength, high thermal conductivity and high weight stability, are very difficult to simultaneously achieve in electrical-insulation applicable cured potting-adhesive materials. to deal with this challenge, in this work, we have designed and fabricated a series of epoxy based composite potting-adhesives filled with low-cost and high-performance inorganic micro-particles including alpha-silica, alphaalumina and alpha-Sic. combination employment of high-molecular-weight and low-molecular-weight epoxy resins as matrices has been made. Heat-induced curing or crosslink of resin matrices has been carried out. Large band gap of silica filler has endowed the cured composite with high breakdown strength and ageing breakdown strength, and meanwhile relatively high deformation trait of silica has led to high shock strength of cured composite. Silica filler has been found to be superior to other two fillers, namely, optimal over-all properties such as dielectric, breakdown, mechanical and thermal features have been obtained in silica filled cured composite. High breakdown strength of ~48 MV m −1 and shock strength of ~9950 J m −2 have been achieved in silica loaded composite. this work might open up the way for large-scale fabrication of promising epoxy-based hybrid potting-adhesives.Recently, potting adhesive materials with promising electrical, mechanical and thermal properties have triggered general attention and research interest in the field of fabricating aerospace applicable special power supplies 1 . Inorganic particles filled polymer based hybrid potting adhesives are consisting of polymer matrix, curing-agent, curing boosting agent, plasticizer, thermally conductive filler, reactive diluent and demoulding agent 2 . Plenty of epoxy resins in different trademarks have been employed as matrix materials of hybrid potting adhesives, thanks to their high Young's modulus, strong bonding force toward massive substrates, high solvent resistance and low production cost. Mixing different epoxy resins as matrices has been found to be highly helpful to achieving desirable high fluidity and high mechanical strength in composite potting adhesives, at the same time 3 . Furthermore, lots of acid-anhydride derived curing-agents such as methyl tetrahydrophthalic anhydride have been adopted in hybrid potting adhesives, attributed to rather wide temperature-applying range and favorable high electric insulation trait of cured epoxy based adhesives gained via those curing-agents 4 . By using those acid-anhydride derived curing-agents, potting adhesives have achieved several desired features such as easy perfusion process, low curing volume-shrinkage and high curing mechanical property. Besides, amine derived curing-agents have been found to result in property failure of cured adhesives at high temperature, but no performance failure was found at low temperature 5 .Although huge success has been obtained in acid-anhydride derived curing...

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“…This effect is attributed to either the absorption of the compounds on the metal surface or the formation of some complexes on it. Also known is the use of The current issue and full text archive of this journal is available at www.emeraldinsight.com/0003-5599.htm Anti-Corrosion Methods and Materials 59/4 (2012) 190-194 q Emerald Group Publishing Limited [ISSN 0003-5599] [DOI 10.1108/00035591211242023] coatings systems containing a wide variety of polymeric compounds with the presence of various other additives, metals, oxides, clays, nanocomposites (Kouloumbi et al, 2005;Patil and Radhakrishnan, 2006;Yu et al, 2008;Souza, 2007).…”

Section: Introductionmentioning

confidence: 99%

The effect of additions of carboxylic acids to the anodising bath on the corrosion and SCC of anodised aluminium

Spathis

Papastergiadis

2012

Anti-Corrosion Methods and Materials

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Purpose -The purpose of this paper is to study of the effect of carboxylic acids additions to the anodising bath on the subsequent corrosion and stress corrosion cracking (SCC) tendencies of anodised 1050 Al-Alloy in 3M NaCl solution. Design/methodology/approach -The study was carried out using SCC tests and electrochemical cyclic potentiodynamic measurements at a high or a slow scan rates. The anodic coatings were prepared electrolytically in a bath of 4 M H2SO4, with and without additions of 0.015 M oxalic, malonic, tartaric, maleic, or citric acids. The consequent thicknesses and packing densities of the coatings were measured. Findings -The SCC behaviour was found to vary with both anodising conditions and stress level. The addition of carboxylic acids in the anodising bath increased the protective properties of the coating. In corrosion conditions without stress, the addition of the carboxylic acids decreased the susceptibility to pitting corrosion, the effect depending on the presence or absence of corrosion products. The addition of the carboxylic acids during anodising leads to the formation of less porous and more compact oxide layers and increases the anticorrosive properties of the coatings. The benefits were most pronounced for the coating prepared in the presence of maleic acid.Research limitations/implications -The belief that the effect of carboxylic acids on the corrosion and SCC behaviour of Al-Alloys is due to the absorption of these compounds on the metal surface and the formation of complexes on it, depending on the structure and carbonic chain of these compounds, remains yet to be confirmed. Practical implications -Anodic coatings prepared in an electrolytic bath containing carboxylic acids can be used for the protection of aluminium alloys against corrosion. Originality/value -The paper provides information regarding the improvement of the anticorrosive properties of electrolytically prepared anodic coatings on aluminium alloys.

show abstract

Determination of the performance of epoxy coatings containing feldspars filler

Cited by 15 publications

References 9 publications

Anticorrosive coatings: a review

Anticorrosive coatings: a review

High-performance ceramic/epoxy composite adhesives enabled by rational ceramic bandgaps

The effect of additions of carboxylic acids to the anodising bath on the corrosion and SCC of anodised aluminium

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