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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
... Phosphate compounds found in conversion coatings Compound name (a) Chemical formula Structure Vivanite Fe 3 (PO 4 ) 2 · 8H 2 O Monoclinic Iron-hureaulite (b) Fe 5 H 2 (PO 4 ) 4 · 4H 2 O Monoclinic Strengite FePO 4 · 2H 2 O Orthorhombic Hopeite Zn 3 (PO 4 ) 2 · 4H 2 O...
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: 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 Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003217
EISBN: 978-1-62708-199-3
.... It describes 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 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: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004126
EISBN: 978-1-62708-184-9
... 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 Conversion Coatings” and “Chromate and Chromate-Free Conversion Coatings” in Volume 13A. Black sulfide coatings...
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 Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006492
EISBN: 978-1-62708-207-5
... as chromates or Cr 6+ phosphates. Due to worker health and safety concerns, alternatives including trivalent chromium and chromium-free conversion coatings are being developed and increasingly adapted. Painting is the application of a protective and decorative organic coating to a substrate...
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
... 1989 , Report No. FC89-572, Society of Manufacturing Engineers 3. Sankara Narayanan T.S.N. and Subbaiyan M. , Acceleration of the Phosphating Process: An Overview , Prod. Finish. , Sept 1992 , p 6 – 7 4. Bridger R. and Burden P. , Conversion Coating Is Becoming...
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
... 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 compound involves incorporation of the main element in the substrate (i.e., iron) through oxidation...
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
... 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 experienced a greater severity of filiform attack. If left unchecked, filiform corrosion may lead to more serious...
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: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003679
EISBN: 978-1-62708-182-5
... of a self- healing chromate conversion coating ( Ref 73 ). Self-healing is only associated with CCCs that contain leachable Cr(VI) such as chromium chromate coatings. Chromium phosphate coatings, which contain primarily Cr(III) are not self- healing. Additionally, Cr(VI) in chromium chromate that have...
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
... The three major anodizing processes, as well as anodizing equipment, applications, troubleshooting, and coating evaluation, are described in detail in the article “Anodizing” in this Volume. Chemical conversion coatings are adherent surface layers of low-solubility oxide, phosphate, or chromate...
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
... details common conversion coatings and their useful properties (chromate and phosphate conversion coatings are discussed in greater detail in the articles “Chromate Conversion Coatings” and “Phosphate Coatings” in this Volume). Most of the successful processes are proprietary, and reproducibility...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001221
EISBN: 978-1-62708-170-2
... The total surface area to be cleaned Effects of previous processes Rust inhibition requirements Materials handling factors Surface requirements of subsequent operations, such as phosphate conversion coating, painting, or plating Very few of these factors can be accurately quantified, which...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003221
EISBN: 978-1-62708-199-3
... 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. The normal sequence of preparation steps prior to painting...
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
... bonding characteristics. When forming high-alloy steels (e.g., stainless), oxalate conversion coatings are used as lubricant carriers; they also react with the corresponding soap. For aluminum cold forging with severe deformation, special phosphate, aluminate, or fluoride conversion coatings are used...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003221
EISBN: 978-1-62708-199-3
... dipping, electrochemical cleaning, mechanical cleaning, and mass finishing. It also examines coating processes such as plating, anodizing, chemical conversion coating, and thermal spray, and concludes with a discussion on oxidation-resistant coatings for refractory metals. anodizing barrel...