Degradation evaluation of corrosion protective coatings by electrochemical, physicochemical and physical measurements

Sekine, Isao; Yuasa, Makoto; Hirose, Norimitsu; Tanaki, Toshiyuki

doi:10.1016/s0300-9440(02)00113-3

Cited by 28 publications

(8 citation statements)

References 16 publications

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“…The SVET found a wide range of applications in the study of corrosion phenomena [30][31][32][33]; this technique uses a mobile microelectrode to detect and quantify localised corrosion currents occurring at the metal-electrolyte interface as pitting and crevice corrosion, surface microcracks, weld corrosion, galvanic and intergranular corrosion, corrosion in coated steel samples and deterioration of organic coatings.…”

Section: Introductionmentioning

confidence: 99%

Classic and local analysis of corrosion behaviour of graphite and stainless steels in polluted phosphoric acid

Iken¹,

Basseguy

Guenbour³

et al. 2007

Electrochimica Acta

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In phosphoric acid solution (40% H 3 PO 4 ), the corrosion behaviour of graphite and stainless steels was studied by the use of different electrochemical methods, namely polarization curve analysis, electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). The combined effect of chemical impurities and the increase of medium temperature was studied to approach the real conditions in the process of phosphoric acid manufacturing. It was found that the current density measured by polarization curves increased with the presence of chloride and sulphate ions in the acid solution whatever the tested material. Compared to stainless steels, graphite had the best corrosion resistance in polluted phosphoric acid. However, for graphite the increase of temperature from 20 to 80• C induced an increase of the corrosion rate and potential and a decrease of the resistance confirmed by EIS results. Subsequently, local currents were detected at the surface of the sample by using the scanning vibrating electrode technique. From the data obtained, graphite surface manifested a distinctive behaviour from that of stainless steels. A generalized corrosion was occurred on graphite whereas a localized corrosion was observed for stainless steels. These results show a clear interest of graphite as component material in some of the equipments of the phosphoric acid industry.

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Section: Introductionmentioning

confidence: 99%

Classic and local analysis of corrosion behaviour of graphite and stainless steels in polluted phosphoric acid

Iken¹,

Basseguy

Guenbour³

et al. 2007

Electrochimica Acta

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“…In 2000, Fu et al proposed a method in evaluating coating failure by using acoustic emission [12]. In 2002, Sekin et al used the electrochemical, physiochemical and physical measurements to evaluate the degradation of the coating corrosion [23].…”

Section: Eis Coating Evaluation Methodsmentioning

confidence: 99%

Impedance-Based Wireless Sensor Network for Metal-Protective Coating Evaluation

Zhou

Wang

et al. 2011

International Journal of Measurement Technologies and Instrumentation Engineering

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Researchers have been focused on the influences of flowing fluid on the corrosion of bare metals, but there is little emphasis on the degradation of metal-protective coating. Evaluating the metal-protective coating usually uses the Electrochemical Impedance Spectroscopy (EIS) method. EIS is a technique used for evaluating coating permeability or barrier performance based on the electrical impedance of coating. This paper presents a new impedance-based wireless sensor network for metal-protective coating evaluation. This wireless sensor network consists of two parts: impedance-based wireless sensor nodes and a wireless data base that are equipped with a network analyzer (AD5933) and a RF transceiver (CC1111/CC1110). In the experiment, there are three coating panels immersed in flowing deionized water (DI water) and one coating panel immersed in stationary DI water. Experimental results demonstrate that the proposed wireless sensor network is capable to evaluate the coating degrading.

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“…The susceptibility to degradation of painted metals is estimated by accelerated laboratory tests and natural atmospheric exposure for several years [20][21][22][23][24][25][26][27][28][29][30][31]. Although the extrapolation of accelerated test results do not compare linearly to the actual performance of the coatings in their service life, it can supply useful information related to the rate and form of the corrosion-inhibiting system degradation.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Corrosion of Painted Galvanized and 55%Al-Zn Steel Sheets: Results of 12 Years of Exposure

Elsner

Seré

Sarli

2012

International Journal of Corrosion

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Zinc or 55%Al-Zn alloy-coated steel sheets, either bare or covered by different painting systems, have been exposed for 12 years to the action of the urban atmosphere at the CIDEPINT station located in La Plata (34° 50′ South, 57° 53′, West), province of Buenos Aires, Argentina. The samples exposed surface was evaluated through periodical visual inspections, standardized adhesion tests, and electrochemical impedance measurements. The ambient variables monitored were average annual rains and temperatures, time of wetness, sulphur and chloride concentration, relative humidity, and speed and direction of the winds. It was found that in this atmosphere, the corrosion resistance of the bare 55% Al-Zn/steel sheets was higher than of the galvanized steel, and the polyurethane painting system was more protective than the alkyd and epoxy ones, which degraded after 6-7 years of exposure.

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Degradation evaluation of corrosion protective coatings by electrochemical, physicochemical and physical measurements

Cited by 28 publications

References 16 publications

Classic and local analysis of corrosion behaviour of graphite and stainless steels in polluted phosphoric acid

Classic and local analysis of corrosion behaviour of graphite and stainless steels in polluted phosphoric acid

Impedance-Based Wireless Sensor Network for Metal-Protective Coating Evaluation

Atmospheric Corrosion of Painted Galvanized and 55%Al-Zn Steel Sheets: Results of 12 Years of Exposure

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