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zinc-rich coatings

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Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006049
EISBN: 978-1-62708-172-6
... Abstract The use of zinc in corrosion-protective coatings is due to its higher galvanic activity relative to that of steel. Pure zinc dust provides the best sacrificial protection to steel in a galvanic couple. Zinc-rich coatings can be subcategorized according to the type of binder material...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003693
EISBN: 978-1-62708-182-5
... Abstract This article describes the characteristics of zinc-rich coatings that can be subcategorized according to the type of binder material used. It discusses the formulations of zinc-rich coatings with organic binders. The three major groups of inorganic zinc-rich coatings categorized...
Image
Published: 30 September 2015
Fig. 5 Reactivity of zinc-rich coatings in various pH environments. Source: Ref 17 More
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001304
EISBN: 978-1-62708-170-2
..., hot-dip coating processes, electrogalvanizing, electroplating, metal cladding, organic coatings, zinc-rich coatings, porcelain enameling, thermal spraying, hardfacing, vapor-deposited coatings, surface modification, and surface hardening via heat treatment. alloy steel cadmium plating carbon...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006051
EISBN: 978-1-62708-172-6
... paints Interior high-PVC flats Latex paints Stain-killing paints Zinc-rich primers Smooth finishes Paper coatings Conductive coatings Sealers and undercoaters Aluminum Mica Glass flake Stainless steel Talc Clays Sliver and nickel flake Graphite Acicular Film reinforcement Cracking and checking...
Image
Published: 01 January 2003
Fig. 8 Microstructure of 55Al-Zn coated sheet. Note the interdendritic zinc-rich areas. More
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004108
EISBN: 978-1-62708-184-9
.... The inhibitors currently in use include a number of proprietary compounds, some of which enable coating service lifetimes approaching that associated with restricted lead and chromate pigments. Zinc-Rich Primers The introduction of coatings containing a high percentage of metallic zinc is an important...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... are described in more detail in Corrosion , Volume 13 of the ASM Handbook. However, as a brief introduction, the electrochemical nature of corrosion can be illustrated by the attack on zinc by hydrochloric acid. When zinc is placed in dilute hydrochloric acid, a vigorous reaction occurs; hydrogen gas...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006335
EISBN: 978-1-62708-179-5
... of coatings or a coating system depends primarily on the particular structure, exposure environment, and requirements for corrosion protection. Coatings and coatings systems that typically are used, in general order of increasing performance characteristics, are alkyds, acrylics, zinc-rich primers, epoxies...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003778
EISBN: 978-1-62708-177-1
... to surface flowing of the metal instead of cutting. During grinding, new sheets of abrasive papers and excessive pressure should be avoided, because loose particles of silicon carbide can easily embed in many soft tin-base alloys. For alloys with zinc- and aluminum-rich phases, which may be stained by water...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001012
EISBN: 978-1-62708-161-0
... of the steel. Zincrometal Zincrometal is also used for outer body panels in automobiles. First introduced in 1972, Zincrometal is a coil coated product consisting of a mixed-oxide underlayer containing metallic zinc particles and a zinc-rich organic (epoxy) topcoat. It is weldable, formable, paintable...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003808
EISBN: 978-1-62708-183-2
...). The coating microstructure is rather complex, consisting of aluminum-rich dendrites separated by zinc-rich interdendritic regions. A thin Fe-Al-Zn intermetallic layer is present at the steel surface. The intermetallic layer is separated from the alloy overlay by a thin silicon-rich layer. Silicon is also...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006040
EISBN: 978-1-62708-172-6
...). In states or regions where volatile organic compound (VOC) regulations are stricter, the 100%-solids amine-cured epoxy coatings are more often selected, because the polyamide epoxy coatings do not meet the VOC limits. A common option provided by some manufacturers today (2015) is an organic zinc-rich primer...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006027
EISBN: 978-1-62708-172-6
... , Corrosion: Fundamentals, Testing, and Protection , Vol 13A , ASM Handbook , ASM International , 2003 , p 817 – 833 • Tator K.B. , Zinc-Rich Coatings , Corrosion: Fundamentals, Testing, and Protection , ASM Handbook , Vol 13A , ASM International , 2003 , p 837 – 844 ...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003688
EISBN: 978-1-62708-182-5
... of the 55Al-Zn coating is shown in Fig. 8 . The coating has a two-phase microstructure. This is best explained by reference to the aluminum/zinc phase diagram. One phase is the primary aluminum-rich dendritic phase that begins to grow initially during solidification. The other is an interdendritic zinc-rich...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003809
EISBN: 978-1-62708-183-2
.... Although some galvanic protection is afforded, most of the protection is provided by the barrier formed by zinc corrosion products. Zinc-rich primer is a typical component of a heavy-duty coatings system. Corrosion Protection of Steel Structures by Organic Coatings All features that are important...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006072
EISBN: 978-1-62708-172-6
... consumed in the atmosphere, while the zinc-rich primer inhibits corrosion from occurring at locations where the outer coating layer is breached. Coating systems consisting of a zinc-rich primer, an epoxy intermediate coat, and an acrylic polyurethane topcoat have been used to protect steel bridges in most...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003830
EISBN: 978-1-62708-183-2
... the outer layer to the steel. Galfan, 95Zn-5Al and a small amount of mischmetal, has a multiphase microstructure that is characteristic of its composition, exhibiting a lamellar structure of alternating zinc-rich and aluminum-rich phases. More recently, some magnesium-alloyed zinc-coated steel sheets have...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003781
EISBN: 978-1-62708-177-1
... of precipitation in the zinc solid solution ( Fig. 15 ). An alloy with 0.9% Cu, UNS Z35841, ZA-27, shows primary cored aluminum-rich dendrites with peritectic α + η and white ε-phase particles ( Fig. 16 ). The same alloy in a sand cast specimen that was treated 3 h at 360 °C (680 °F) shows course ε-phase particles...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006028
EISBN: 978-1-62708-172-6
... are the reaction products of alkoxy silane monomers and metal hydroxide (e.g., sodium or potassium hydroxide). They are highly specialized in protective finishes such as zinc-rich primers, masonry treatments for water repellency, or cement coatings into which they are compounded directly for improved physical...