Galvanic Corrosion on Automobiles

Baboian, Robert; Haynes, Gardner; Turcotte, Raphaël

doi:10.1520/stp26203s

Cited by 7 publications

(2 citation statements)

References 9 publications

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“…In the electrical couple, corrosion starts in the less corrosion resistant material (more active) which becomes the anode whereas the more resistant material (nobler) will be cathode. 73 Metallographic structure and microstructural properties have an influence on corrosion behaviour. 67…”

Section: Corrosionmentioning

confidence: 99%

Structure and corrosion properties of cold sprayed coatings: a review

Koivuluoto

Vuoristo

2014

Surface Engineering

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Coating technology is growing because of its important role in improving, e.g. corrosion resistance, thermal and electrical conductivities, and other properties of material in order to decrease costs and increase service life and safety. Cold spraying is the technique to produce coatings from powder feedstock by spraying solid particles on the substrate, forming the coating. Cold spraying is a relatively new spraying method, which has many advantages over other forms of thermal spraying. The advantages are dense and pure structures, high deposition efficiency, low residual stresses, minimal heat input to substrate, phase and compositional stability, and little need for masking. Furthermore, cold spraying is a cost effective and environmentally friendly alternative to, e.g. soldering, electroplating, and painting. One potential application field of cold sprayed coatings is corrosion protection due to the possibility to produce fully dense and impermeable coatings. From this aspect, this review is focused on corrosion properties of cold sprayed coatings and structural details behind these coatings.

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Section: Corrosionmentioning

confidence: 99%

Structure and corrosion properties of cold sprayed coatings: a review

Koivuluoto

Vuoristo

2014

Surface Engineering

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“…Galvanic corrosion can be either localized or generalized. Baboian and Pohlman (1988) classified galvanic corrosion in five groups: different metals; non-metallic conductors acting as cathodes; metallic coatings of sacrificial metal and noble metal; cathodic protection; and deposition of different metallic ions on the metal surface. The rate of galvanic corrosion and the potential distribution in the galvanic couple depend on the electrochemical properties of the materials, water properties, working temperature, and system geometry (Gentil, 1996;Fontana and Greene, 1967).…”

Section: Introductionmentioning

confidence: 99%

Corrosion of materials used in the solar energy industry

Santos¹,

Araújo²,

Lins³

2008

Anti-Corrosion Meth & Material

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If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -The purpose of this paper is to study the corrosion of the coupling of two different types of stainless steel, austenitic and ferritic, used in the fabrication of water reservoirs in the solar energy industry. Design/methodology/approach -Potentiodynamic polarization and gravimetric immersion tests were used to evaluate corrosion of the coupling of two different types of stainless steel, austenitic and ferritic. Findings -The galvanic corrosion was not significant in the case of the coupling of AISI 304 and 444 steels. The difference of the open circuit potentials obtained for the AISI 304 and AISI 444 steels was 28 mV for the polished samples. The galvanic current density (i g ) was 55 nA/cm 2 . The corrosion observed in the stainless steel couple was in the weld area.Research limitations/implications -The methodology used is adequate to evaluate generalized galvanic corrosion. The problem of the corrosion in the coupling of the stainless steels is a problem of localized corrosion and the observed 28 mV potential difference was lower than the dispersion of results usually obtained from readings of corrosion potentials in electrochemical cells. Practical implications -The use of two different types of steel in contact with each other may lead to galvanic corrosion, and the welding of steel pieces may lead to several corrosion problems. Since the boiler may be used in different countries, subject to a great diversity of water quality, corrosion may be a significant problem. Originality/value -Literature data of the AISI 444 steel corrosion behaviour are still scarce. The coupling of two different stainless steels (AISI 304 and 444) in the water reservoir manufacturing was a necessary requirement of the solar energy industry. The manufacturers of boilers must evaluate and quantify the corrosion processes, which occur in the equipment used in the solar energy industry. As the solar energy industry has matured in the last ten years, the corrosion of this equipment may be a significant problem in due course.

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