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Galvanneal coatings

Iron can be beneficial in coatings. The iron-zinc alloys formed in hot dipping or sherardizing can be up to 30% more resistant in mildly acidic conditions, but some workers report lower corrosion resistance with some galvannealed coatings. The iron-zinc alloy layers, while continuing to protect... [Pg.62]

Akerdida and Lyon (1988) incidentally used continuous immersion potentiodynamic polarization tests, and weight loss and ac impedence tests, in intermittent immersion to compare heat-treated (45 min at 450°C) and nonheat-treated coatings in 0.6 M NaCI. They found that the galvannealed coatings (in 8-day tests) corroded twice as fast in intermittent immersion in the NaCl solution. Analysis by ac impedence indicated that a passive film probably consisting of zinc hydroxy compounds was more effective on zinc than on the iron-zinc alloy. [Pg.324]

Jagannathan, V. (1992). The influence of coating characteristics on the powdering and corrosion resistance of galvannealed coated steel sheet. Galvatech 92, Verlag Stahleisen, Diisseldorf, Germany, pp. 127-131. [Pg.476]

Lin] Lin, C.S., Meshu, M., The Effect of Steel Chemistry on The Formation of Fe-Zn Interme-talhc Compounds of Galvanneal-Coated Steel Sheets , Metall. Mater. Trans. B, 25B(5) 721-730 (1994) (Experimental, Kinetics, 31)... [Pg.358]

Linl] Lin, C.S., Meshii, M., Cheng, C.C., Microstructural Characterization of Galvanneal Coatings by Transmission Electron-Microscopy , SIJInt., 35(5), 494-502 (1995) (Experimental, Kinetics, 43)... [Pg.358]

Surface or interface friction is an important characteristic that affects the formabil-ity of sheet metal products. Sheets and tooling surface characteristics, deformation behavior, and the lubricant are reported to play important roles affecting the surface friction conditions [49]. Recently, increased attention has been given on reducing the surface friction for enhancement in formability of sheet steel products through the application of solid-film lubricants or special po.sttreatments such as phosphates, Cr/CrOx, and so forth on top of electrodeposited zinc or galvannealed Zn-Fe-alloy-coated surfaces [56]. [Pg.36]

Nomi, R., and Fukii, S. (1991). Galvanneal and organic composite coatings. Steel Times, 219(9), 490 91. [Pg.488]

This method requires a preliminary step followed by thermal treatment and diffusion of the coating metal into the substrate. A commercial material known as galvannealed steel is made by coating steel with zinc followed by heat treatment and the formation of an iron-zinc intennetalUc coating by diffusion. [Pg.366]

One additional attribute of metallic coatings, although not typically the only reason for their use, is their suitability to the application of paints. Metallic coatings, such as the iron-zinc coating galvanneal, have a high degree of surface texture, which enhances paint adhesion compared to a relatively smooth steel surface. [Pg.620]

Sag] Sagiyama, M., Inagaki, J.-L, Morita, M., Fe-Zn Alloying Behavior and flie Coating Micro-ctructure of Galvannealed Steel Sheets , NKK Technical Review (Japan), (63), 38—45 (1991) (Abstract, ExperimentaL 14)... [Pg.358]

See other pages where Galvanneal coatings is mentioned: [Pg.267]    [Pg.19]    [Pg.46]    [Pg.211]    [Pg.297]    [Pg.308]    [Pg.142]    [Pg.142]    [Pg.142]    [Pg.179]    [Pg.179]    [Pg.359]    [Pg.267]    [Pg.19]    [Pg.46]    [Pg.211]    [Pg.297]    [Pg.308]    [Pg.142]    [Pg.142]    [Pg.142]    [Pg.179]    [Pg.179]    [Pg.359]    [Pg.131]    [Pg.389]    [Pg.131]    [Pg.267]    [Pg.418]    [Pg.25]    [Pg.36]    [Pg.55]    [Pg.89]    [Pg.291]    [Pg.292]    [Pg.441]    [Pg.622]    [Pg.628]    [Pg.1621]    [Pg.1621]    [Pg.41]    [Pg.138]    [Pg.139]    [Pg.139]    [Pg.242]    [Pg.971]   
See also in sourсe #XX -- [ Pg.141 , Pg.142 ]



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Galvannealed

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