Role of misch metal in galvanizing with a Zn-5%Al alloy

Radtke, Schrade F.; Herrschaft, D. C.

doi:10.1016/0022-5088(83)90164-9

Cited by 16 publications

(3 citation statements)

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“…50 These additions are made to improve the wettability and fluidity of the molten bath without affecting the corrosion resistance of the coating. 51 The microstructure of Galfan is characterized by a two-phase structure, a zinc-rich eta ͑͒ proeutectoid phase surrounded by a eutectic type phase consisting of beta ͑␤͒ aluminum and eta ͑͒ zinc lamellae. 52 The amount of the proeutectic was calculated to be 18%.…”

Section: Resultsmentioning

confidence: 99%

Pitting Corrosion of Zn and Zn-Al Coated Steels in pH 2 to 12 NaCl Solutions

Miao

Cole

Neufeld

et al. 2007

J. Electrochem. Soc.

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Corrosion behavior of hard zinc, Zn-5% Al ͑Galfan͒, and Zn-55% Al alloy ͑Zincalume or Galvalume͒ coated steels was studied using cyclic voltammetry and potential scan/hold technique in the presence of 0.10-0.90 mol L −1 NaCl over a pH range of 2 to 12. Influence of chloride concentration and electrolyte pH on pitting potential values of the above three types of specimens were examined. On the basis of the electrochemical, scanning electron microscopy with energy dispersive X-ray spectroscopy, and chemical equilibria data obtained from hard zinc, a pitting corrosion mechanism involving a series of processes from anion competitive adsorption to penetration to nucleation and growth was proposed.

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Section: Resultsmentioning

confidence: 99%

Pitting Corrosion of Zn and Zn-Al Coated Steels in pH 2 to 12 NaCl Solutions

Miao

Cole

Neufeld

et al. 2007

J. Electrochem. Soc.

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“…Atomic diameter difference between La/Ce and Zn is 0?65 and 0?53 A respectively, which leads to negative residual viscosity of the galvanising melts after RE addition. Viscosity of Zn (3?5 MPa s) is higher than that of La and Ce (2?65 and 3?20 MPa s respectively) at the melting points, therefore (x Zn m Zn zx Re m Re )vm Zn (2) According to equation ( 2), the viscosity of Zn melts will decrease after RE addition, i.e. the fluidity of the melts will be improved, leading to smaller coating thickness.…”

Section: Coating Thicknessmentioning

confidence: 99%

“…Investigation showed that small mischmetal additions (LazCe,0?5%) in hot dip Zn-5Al coating (Galfan) can improve the wetability and fluidity of bath and minimise the spangle structure without affecting the corrosion resistance of the coating. 2 In the present paper, the effect of RE on microstructure, Fe-Zn reaction and corrosion resistance of galvanised Zn-0?18Al coating are studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of rare earth metals on microstructure and corrosion resistance of Zn–0·18Al coatings

Gao

Tan

et al. 2011

Materials Science and Technology

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Effect of rare earth (RE) metals addition on the microstructure, formation of Fe-Zn intermetallics and corrosion resistance of the batch galvanising Zn-0?18Al coating were studied. Microstructure of the coating was observed using optical microscopy, scanning electron microscopy and transmission electron microscopy. Salt spray test and surface potential measurement were employed for corrosion resistance determination. The results show that the addition of RE can improve bath liquidity, refine surface spangles, stabilise the Fe 2 Al 5 inhibition layer, decrease coating thickness and enhance corrosion resistance of the coating. However, corrosion resistance of the coating did not increase continuously with increasing RE content and the optimum RE content lies between 0?045 and 0?069% in the experiment. Mechanism of RE on the corrosion resistance of the galvanised coating was briefly analysed.

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Cerium Mischmetal, Cerium Alloys, and Cerium Compounds

Reinhardt¹,

Winkler

2000

Ullmann's Encyclopedia of Industrial Chemistry

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Role of misch metal in galvanizing with a Zn-5%Al alloy

Cited by 16 publications

References 0 publications

Pitting Corrosion of Zn and Zn-Al Coated Steels in pH 2 to 12 NaCl Solutions

Pitting Corrosion of Zn and Zn-Al Coated Steels in pH 2 to 12 NaCl Solutions

Effect of rare earth metals on microstructure and corrosion resistance of Zn–0·18Al coatings

Cerium Mischmetal, Cerium Alloys, and Cerium Compounds

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