Online from: 1972
Subject Area: Mechanical & Materials Engineering
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|Title:||Effect of heating on the performance of anticorrosive coatings|
|Author(s):||M. Estefanía Angeles, (Department of Metallurgical Engineering, UNAM, Mexico City, Mexico and División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Ciudad Madero, Ciudad Madero, Mexico), Francisco Rodríguez, (Department of Metallurgical Engineering, UNAM, Mexico City, Mexico), Carlos Magaña, (Institute of Physics, UNAM, Mexico City, Mexico)|
|Citation:||M. Estefanía Angeles, Francisco Rodríguez, Carlos Magaña, (2012) "Effect of heating on the performance of anticorrosive coatings", Pigment & Resin Technology, Vol. 41 Iss: 1, pp.42 - 48|
|Keywords:||Coatings, Corrosion protection, Dry aging, Epoxy resins, Heating, Impedance|
|Article type:||Research paper|
|DOI:||10.1108/03699421211192271 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
Purpose – When coatings are applied to industrial equipment, they have to be able to stand the heat produced by solar energy and/or by different conditions on the process. Therefore, the purpose of this paper is to study the effect of temperature on the protective properties of coatings since this parameter degrades the polymer structure. In addition, the temperature effects on dry coating can also be specified.
Design/methodology/approach – In order to know the behaviour of an organic coating at different temperatures, a drying aging cycle was performed by heating on substrate steel and free-of-substrate films during ten uninterrupted days at three and different temperatures: 65, 85 and 100°C. At the end of this period, the aged films were analyzed by means of electrochemical impedance spectroscopy (EIS) measurements, thermal analysis (DSC and TGA), Fourier transform infrared spectroscopy (FTIR), and scanning electronic microscopy (SEM).
Findings – The most critical temperature for the aging was 85°C and “over-cured” phenomenon were observed on the aged films which were reported by EIS, thermal and IR analyses.
Practical Implications – These aging conditions were tested on a very strong and rigid resin containing a barrier pigment. Thus, it can also be applied to other plastic coatings, such as vinyl or alkyd ones, by modifying the temperatures according to glass transition temperature (T
Originality/value – The value of this work is on the specific temperatures used for the aging method applied to a rigid resin which revealed the over-cured phenomena and the behaviour of the pigment; so if it is applied to a more plastic and flexible coating, it may reveal other phenomena and promote other kind of degradation, maybe even more aggressive ones.
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