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phosphate conversion coating

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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003678
EISBN: 978-1-62708-182-5
..., and theory of phosphate coatings and their formation. It also discusses the composition of phosphating baths, phosphate layers, and their analysis, as well as the process hardware necessary to realize these treatments. Structure and Function of the Phosphate Film Phosphate conversion coatings...
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
... Abstract This article provides a brief discussion on the common types of overlayers that can be used on a metal surface to protect it from corrosion. These overlayers include phosphate, chromate, and chromate-free conversion coatings; hot dip galvanizing; cementitious linings; glass...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006521
EISBN: 978-1-62708-207-5
... Abstract Chemical conversion coatings are adherent surface layers of low-solubility oxide, phosphate, chromate, and chromate-free compounds produced by the reaction of suitable reagents with the metallic surface. This article provides an overview on chromate-free coatings, along with coverage...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004126
EISBN: 978-1-62708-184-9
... Conversion coatings used on military equipment include chromate conversion coatings on aluminum, cadmium, and zinc-base products such as galvanize or zinc die castings. Electroless nickel, zinc and manganese phosphate, and black oxide are considered conversion coatings on steel. See the articles “Phosphate...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001315
EISBN: 978-1-62708-170-2
... without subsequent finishing. However, a variety of finishes are used for improved corrosion protection or appearance: conversion coatings, such as chromate, phosphate, and anodize; organic paint of various types; and metallic coatings, including electroplating, electroless plating, and vacuum metallizing...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003217
EISBN: 978-1-62708-199-3
... continuous electrodeposition for steel strip and babbitting and discusses phosphate and chromate conversion coatings as well. It also addresses painting, discussing types and selection, surface preparation, and application methods. In addition, the article describes rust-preventive compounds...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001275
EISBN: 978-1-62708-170-2
... such an increase in pH at the surface. A similar mechanism is postulated for the formation of crystalline phosphate conversion coatings on steel, in which two principal crystalline phases have been identified: hopeite, Zn 3 (PO 4 ) 2 ·4H 2 O, and phosphophillite, Zn 2 Fe(PO 4 ) 2 ·4H 2 O ( Ref 5 ). The latter...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003679
EISBN: 978-1-62708-182-5
..., it is common for conversion- coated surfaces to be painted within the first 24 to 48 h after coating application ( Ref 40 ). Chromium Phosphate Conversion Coatings Chromium phosphate conversion coatings (CPCCs) are used in aluminum alloys to promote corrosion resistance and paint adhesion...
Book Chapter

Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001274
EISBN: 978-1-62708-170-2
..., solution pH at the metal surface rises slightly. This is what causes the primary phosphate salts to drop out of solution and react with the metal surface, forming a crystalline coating. All iron phosphate conversion coatings are composed of partially neutralized phosphoric acid. But all iron phosphates...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006492
EISBN: 978-1-62708-207-5
... by cleaning/degreasing. A pretreatment, which is often a chromate or chrome phosphate conversion coat, is applied, and after drying/curing, a primer and one or more topcoats are applied. Coil coating is a continuous, automated process for coating metal before fabrication into end products. The metal substrate...
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
... in the environment; change in the alloy or heat treatment; change in design; use of galvanic protection; use of inhibitors; use of nonmetallic coatings and liners; application of metallic coatings; use of surface treatments, thermal spray, or other surface modifications; corrosion monitoring; and preventive...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001308
EISBN: 978-1-62708-170-2
..., and coating of aluminum. These include abrasive blast cleaning, barrel finishing, polishing, buffing, satin finishing, chemical cleaning, chemical brightening, electrolytic brightening, chemical etching, alkaline etching, acid etching, chemical conversion coating, electroplating, immersion plating...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004032
EISBN: 978-1-62708-185-6
... films for titanium and superalloys hot forgings. These candidates are discussed briefly in the following sections. Conversion Coatings and Soaps Zinc phosphate coatings with reactive alkaline soaps as lubricant are still state of the art for most cold-forging operations when mild or low-alloy...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003672
EISBN: 978-1-62708-182-5
... conversion coating techniques, produces a protective aluminum oxide film on the aluminum metal. Another example of a chemical conversion coating is phosphatizing for the protection of automobile bodies. Metallic coatings create a barrier between the metal substrate and the environment. In addition...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001323
EISBN: 978-1-62708-170-2
... Chromate Conversion Coating Alternatives Other chromate conversion coating alternatives may prove to be of use in eliminating chromium from conversion coatings. These include sulfuric acid/boric acid anodizing (SBAA), various phosphate treatments, and other emergent technologies. SBAA...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003614
EISBN: 978-1-62708-182-5
... and primed two-component epoxy paint systems experience far fewer incidences of filiform corrosion than single-coat systems did ( Ref 24 ). Filiform corrosion rarely occurred when bare aluminum was chromic-acid anodized or primed with chromate or chromate-phosphate conversion coatings. Rougher surfaces also...
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
... Abstract This article discusses the classifications, compositions, properties, advantages, disadvantages, limitations, and applications of the most commonly used methods for surface engineering of carbon and alloy steels. These include cleaning methods, finishing methods, conversion coatings...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001303
EISBN: 978-1-62708-170-2
... all oils and oxide scale because these inhibit good phosphating. If castings are heat treated before they are coated, the choice of heat treatment conditions can influence the properties of the coating, particularly a metallic or conversion coating. In most cases, heat treatment should be done...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006423
EISBN: 978-1-62708-192-4
.... The process is known as conversion coating. Different lubricant carriers were developed for use with different materials. For example, zinc-phosphate Zn 3 (PO 4 ) 2 coating is used for carbon-steel wires, whereas oxalate, or (COO)2-2, coating is used for stainless steel rod wires. After acquiring the precoat...
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
..., and service life of the host material. The article covers metallic coatings, including zinc, aluminum, zinc-aluminum alloys, tin, and terne; pretreatment or phosphate coatings; and preprimed and painted finishes based on organic coatings. aluminum coatings aluminum-zinc alloy coatings hot dip process...