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zinc-coated steels

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730149
EISBN: 978-1-62708-283-9
... ores, and 30% from recycled zinc. The level of recycling is increasing in step with progress in zinc production technology and zinc recycling technology. The supply of zinc-coated steel scrap increases annually as more auto body steel is galvanized. Approximately half of the world’s steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220445
EISBN: 978-1-62708-259-4
... to martensite. Retained austenite is present. SEM, SE. Etchant: nital 2%. Courtesy of J. Speer, reproduced from Ref 14 with permission. 13.7 Coatings Steels for forming are frequently coated, mostly for corrosion protection. The two most common families of coatings are zinc-based coatings ( Ref 16...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... is achieved by the addition of inhibitive pigments to paints. Sacrificial protection is achieved by coating the substrate with a more active metal. This results in the substrate becoming the cathode in the corrosion cell. Galvanized steel, which is comprised of a thin layer of metallic zinc over a steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350125
EISBN: 978-1-62708-315-7
... (commonly steel or galvanized steel), very specialized high-speed roller application equipment is used to coat the sheet steel as it is unwound from a coil. The paint used in the coil-coating process can be of virtually any generic type, although alkyds, polyesters, epoxies, and zinc-rich epoxy coatings...
Image
Published: 01 August 2018
Fig. 13.34 (a) Cross section of a sheet coated by Galvalume. The aluminum-rich dendrites are darker. The interdendritic regions rich in zinc are lighter in SE mode in the SEM. (b) Transverse cross section of a steel sheet coated with Galvalume, partially corroded. The zinc-rich regions have More
Image
Published: 01 January 2000
Fig. 11 Service life (time to 5% rusting of steel surface) versus thickness of hot dip galvanized (zinc) coating for selected atmospheres Atmosphere Description Heavy industrial atmospheres These contain general industrial emissions such as sulfurous gases, corrosive mists More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
..., or a substance adsorbed on or absorbed in another substance. All structural metals corrode to some extent in natural environments (e.g., the atmosphere, soil, or waters). Bronze, brass, most stainless steels, zinc, and pure aluminum corrode so slowly in service conditions that long service life is expected...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400073
EISBN: 978-1-62708-316-4
... used for automotive structural members, steel roofing, and architectural framing to vacuum-degassed interstitial-free steels used in applications demanding the highest available formability. Common steel coatings include zinc, aluminum, tin, lead, nickel, and various alloys of these metals, as well...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040067
EISBN: 978-1-62708-300-3
... ] 7.6.1 Ferrous Materials Carbon Steels Because of the severe deformation conditions typical of many cold forging operations, the most widely used lubrication system in the cold forging of carbon steels is a zinc phosphate coating and soaping system ( Fig. 7.5 ). However, simple forging processes...
Image
Published: 01 January 2000
Fig. 7 Principles and mechanism of galvanic protection of a substrate by a coating. Galvanic protection of a steel substrate at a void in a zinc coating. Corrosion of the substrate is light and occurs at some distance from the zinc. More
Image
Published: 01 March 2001
Fig. 14 Principles and mechanism of galvanic protection of a substrate by a coating. Galvanic protection of a steel substrate at a void in a zinc coating. Corrosion of the substrate is light and occurs at some distance from the zinc. More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030184
EISBN: 978-1-62708-282-2
... steel Coated steel To polarize After polarization To polarize After polarization Moving seawater 30–35 7–10 3–5 1.0–1.5 Stagnant seawater 15–25 4–7 1–3 0.5–1.0 Soil zone 4–5 1–1.5 0.5–1.0 0.1–0.5 Design of zinc sacrificial anode system for a pipe pile structure...
Image
Published: 01 January 2000
(undercutting) of paint where exposed steel is rusting. (c) A void in the coating of a painted galvanized steel is sealed with zinc corrosion products; this avoids the undercutting seen in (a) and (b) and prevents further deterioration of the painted coating. Photograph courtesy of J. Lederer, Department More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740325
EISBN: 978-1-62708-308-9
... the adhesion of paint or other organic finishes, and to provide the metallic surface with a decorative finish. Chromating processes are used to finish aluminum, zinc, steel, magnesium, cadmium, copper, tin, nickel, silver, and other substrates. Chromate conversion coatings are widely used in the aerospace...
Image
Published: 30 September 2023
Figure 6.19: Development of a dry in-place coating on a steel surface. (a) The water-based solution is applied, often by dipping; (b) water is evaporated and the phosphate adheres to the steel; (c) the subsequent two-material coating, with zinc phosphate substrate and low friction surface More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030019
EISBN: 978-1-62708-282-2
.... Galvanic corrosion of the substrate can occur at pores, damage sites, and edges in the noble metal coating. Sacrificial metal coatings provide cathodic protection of the more noble base metal, as in the case of galvanized steel or Alclad aluminum. Cathodic Protection Magnesium, zinc, and aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910407
EISBN: 978-1-62708-250-1
... that is more active (i.e., have a more negative corrosion potential) than the metal/steel to be protected. Commercial sacrificial anodes include magnesium, zinc, and aluminum. The potential difference between the freely corroding potential of the structure to be protected and the sacrificial anode must...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350001
EISBN: 978-1-62708-315-7
... resistance and heat resistance Hot-dip galvanizing (zinc coatings) Improved corrosion resistance via sacrificial protection of steel substrate Hot-dip aluminizing Improved corrosion and oxidation resistance of steel substrate Hot-dip lead-tin alloy-coatings (terne coatings) Improved corrosion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240323
EISBN: 978-1-62708-251-8
... that isolate the metal from the environment, or by cathodic protection. In cathodic protection, the metal to be protected is electrically connected to a more anodic metal, so that the sacrificial anodic metal corrodes instead of the metal being protected. For example, steel is often coated with zinc...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910237
EISBN: 978-1-62708-250-1
... coatings Thermal spray coatings (zinc, aluminum, or zinc-aluminum alloys) Electroless and electroplated coatings, for example, nickel-phosphorus, nickel, chromium, nickel-chromium-copper, zinc, and cadmium Clad coatings, for example, roll-bonded stainless steel on carbon steel Pack cementation...