Update on the Development of an Improved Cosmetic Corrosion Test by the Automotive and Steel Industries

Roudabush, L. A.; Townsend, H. E.; McCune, Duncan

doi:10.4271/932334

Cited by 11 publications

(3 citation statements)

References 10 publications

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“…In a recent paper [37] the authors studied the possibility of applying to WS the accelerated wet/dry cyclic corrosion tests commonly used to evaluate organic and metallic coatings on ferrous metals: Kesternich test [38,39] (for SO 2 polluted atmospheres), and Prohesion test [40] (for marine atmospheres). These laboratory wet/dry cyclic tests made it possible to shorten the testing time to assess the protective capacity of rust formed on WS.…”

Section: Corrosion Testing and Performance Evaluationmentioning

confidence: 99%

Weathering steels: From empirical development to scientific design. A review

Morcillo¹,

Díaz²,

Chico³

et al. 2014

Corrosion Science

228

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The design of the first weathering steels was purely empirical and focused on a small number of conventional alloying elements such as manganese, silicon, chromium, nickel, copper and phosphorus, mainly. The environmental conditions that promote the formation of protective rust layers: existence of wet/dry cycling, absence of very long wetness times, atmospheres without a marine component, etc., were identified by trial and error. This paper makes a bibliographic review of the abundant literature that has been published on the atmospheric corrosion of weathering steels, setting out in chronological order the advances made in the scientific knowledge of important matters such as: atmospheric corrosion mechanisms of weathering steel, formation of protective rust layers, and the role played by alloying elements. The work ends with an overview of the scientific design of new weathering steels, placing special emphasis on the new compositions developed for application in marine atmospheres.

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Section: Corrosion Testing and Performance Evaluationmentioning

confidence: 99%

Weathering steels: From empirical development to scientific design. A review

Morcillo¹,

Díaz²,

Chico³

et al. 2014

Corrosion Science

228

View full text Add to dashboard Cite

show abstract

“…Recently, the effect of chemical conversion coating and electro-deposition coating on automobile corrosion was evaluated based on observations of corrosion of automobiles in service. 2,3) An attempt was made to analyze the composition of iron rust on automobiles in environments including salt, 4) based on the possibility that the composition of iron rust depends on the conditions of the environment.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analyses of Crystalline Compositions of Iron Rust on Automobiles under Service Conditions.

Fujita

Kajiyama

2001

ISIJ International

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Quantitative analyses of the crystalline composition of rust that formed on automobiles under service conditions was carried out to investigate the corrosion mechanism of zinc-coated steel panels. The composition of the rust was quantitatively analyzed by X-ray diffraction using the internal-standard technique. The rust compositions in the crevice and on the surface of the outer panels were located within each characteristic region in the a-FeOOH/(g-FeOOHϩFe 3 O 4 )/remainder ternary diagram that we proposed in the present study. The rust in crevices contained more (g-FeOOHϩFe 3 O 4 ) than that on the surface. The largest amount of amorphous iron rust formed in the crevices of galvanized steel panels under zinc corrosion products during the initial stage of steel corrosion. Crystalline b-FeOOH then appeared until the amount reached a maximum content of 13 %. The composition of iron rust on zinc-coated steel sheets progresses towards that of the ungalvanized regions. It was found that the production of crystalline iron rust was retarded when zinc corrosion product formed in the crevice of lapped areas.

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“…The steel industries such as automotives, electronics and households, which utilize steels as a major component for their manufacturing, are constantly in need for developing the coating-materials and processings that effectively provide corrosion resistance for the steel structures [1][2][3][4][5][6][7][8][9][10][11]. Electrogalvanized coating, also known as electrodeposited zinc (EZ), which refers to an application of zinc coatings onto steel surfaces via the electrodeposition process, has been employed widely for corrosion protection [12][13][14].…”

Section: Chapter I Introduction 11 Overviewmentioning

confidence: 99%

Nanostructural Investigation and Engineering of Electrodeposited Zinc Coatings and Their Chromium and Graphene-Based Passivation Layers

Jantaping

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Electrodeposited zinc is an important type of coating used widely for corrosion protection in various applications. Nevertheless, the understanding on the relationships between coating fabrication process, micro/nanostructure, and properties of the material is rather limited. This thesis aims to develop structure-corrosion property relationship frameworks for the electrodeposited zinc coating and its chromium conversion layer, and also explore the novel process, particularly top-coating of graphene, upon which the corrosion resistance of the zinc coating could be enhanced. The research works performed in this thesis are divided into 3 parts: (i) the processing-structure-property relationships in electrodeposited zinc, (ii) the effects of the EZ’s structure on the formation of Cr(III) passivation, and (iii) the feasibility of graphene-based coatings as a potential for protecting corrosion. A set of environmentally friendly alkaline non-cyanide zinc coatings with and without trivalent chromium passivation is prepared by the electrodeposition process for examination of their micro/nanostructure and corrosion properties. Three groups of plating additives are employed to modulate the structure of the galvanized coating. Using a suite of modern characterization techniques, including field emission scanning electron microscopy (FE-SEM), X-ray diffractometry (XRD), focused ion beam (FIB), and transmission electron microscopy (TEM), it is determined that texture and interfacial defects which are controlled by additive incorporation play critical role in controlling the corrosion behavior of the coatings. Furthermore, polyquaternary amine salt is identified as an effective additive for zinc plating as it helps promotes a formation of a relatively thick amorphous-oxide phase in the chromate film resulting in high resistance to corrosion. Finally, the feasibility study of graphene-based top coatings for corrosion shows that graphene can be coated onto a substrate using the electroplating setup. The coating of graphene is found to be controlled by additives, applied current density, and deposition time. The resulting graphene coating shows appreciable corrosion resistance results, and thus it is promising to be used for top-coating of electrogalvanized zinc.

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Update on the Development of an Improved Cosmetic Corrosion Test by the Automotive and Steel Industries

Cited by 11 publications

References 10 publications

Weathering steels: From empirical development to scientific design. A review

Weathering steels: From empirical development to scientific design. A review

Quantitative Analyses of Crystalline Compositions of Iron Rust on Automobiles under Service Conditions.

Nanostructural Investigation and Engineering of Electrodeposited Zinc Coatings and Their Chromium and Graphene-Based Passivation Layers

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