Zinc phosphate treatment of metals

Bender, Howard S.; Cheever, G. D.; Wojtkowiak, Joseph J.

doi:10.1016/0300-9440(80)80018-x

Cited by 34 publications

(13 citation statements)

References 13 publications

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“…In humans, nickel (II) disrupts protein responses and biochemical pathways, both of which can be toxic [22]. Table 1 lists three informative review articles [12,23,24] on conversion coatings, covering approximately a 50-year period. Although they, in general, cover common areas such as bath chemistry, patents, characterization and operational parameters, each also has useful contributions to the growing body of knowledge of these coatings technologies.…”

Section: Environmental Terminologymentioning

confidence: 99%

Advances in Automotive Conversion Coatings during Pretreatment of the Body Structure: A Review

et al. 2018

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Automotive conversion coatings consist of layers of materials that are chemically applied to the body structures of vehicles before painting to improve corrosion protection and paint adhesion. These coatings are a consequence of surface-based chemical reactions and are sandwiched between paint layers and the base metal; the chemical reactions involved distinctly classify conversion coatings from other coating technologies. Although the tri-cationic conversion coating bath chemistry that was developed around the end of the 20th century remains persistent, environmental, health, and cost issues favor a new generation of greener methods and materials such as zirconium. Environmental forces driving lightweight material selection during automobile body design are possibly more influential for transitioning to zirconium than the concerns regarding the body coating process. The chemistry involved in some conversion coatings processing has been known for over 100 years. However, recent advances in chemical processing, changes in the components used for vehicle body structures, environmental considerations and costs have prompted the automobile industry to embrace new conversion coatings technologies. These are discussed herein along with a historical perspective that has led to the use of current conversion coatings technologies. In addition, future directions for automobile body conversion coatings are discussed that may affect conversion coatings in the age of multi-material body structures.

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Section: Environmental Terminologymentioning

confidence: 99%

Advances in Automotive Conversion Coatings during Pretreatment of the Body Structure: A Review

et al. 2018

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“…11 The application of phosphate ceramic coatings on various metals especially for ferrous substrates has been the subject of numerous studies. [17][18][19][20][21][22][23][24][25][26][27][28] The main reason of applying phosphate primers on steel is to ensure a strong adhesion between substrate surface and subsequent paints and coatings and also provision of corrosion-protective layer adjacent to metal surface. 17,22,23 In phosphating process, an insoluble corrosion-resistant phosphate layer is deposited on the metal surface to protect the substrate from corrosive species.…”

Section: Chemistry and Development Of Zincphosphate Primers On Ferroumentioning

confidence: 99%

Anticorrosive interfacial coatings for metallic substrates

Rahimi¹,

Potrekar²,

Dutta³

et al. 2013

Surface Innovations

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The present state-of-the-art in anticorrosive coatings technology is a multistep process where multilayered hybrid coatings are applied on metallic substrates with each layer having certain functionality and properties. These layers are mainly an interfacial layer, such as inorganic phosphate coatings and/or sol-gel hybrid coatings, which are accompanied by a paint/polymer topcoat. While the main characteristic of the polymer topcoat is a "barrier" role to prevent the diffusion of corrosive species to the metal surface, the primer or the first layer in contact with metal surface is of significant importance due to its role in "active" corrosion prevention capability and promotion of strong adhesion between the substrate surface and subsequent layers. In this article, recent developments in processing and functional properties of zinc-phosphate sacrificial primers and sol-gel-based hybrid coatings will be overviewed. Finally, some of the innovative advancements in this area developed by this research group and others will also be discussed.

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“…Zinc phosphate crystals protect the metal surface from corrosion and provide a suitable interface for bonding with top coatings. 18 The multiple chemical processes of forming the ZnP layer determines the composition/shape of particles, the surface coverage, and the layer thickness. The outermost layer of a single-or dual-powder coating provides a barrier on top, to prevent diffusion processes and the occurrence of chemical and electrochemical reactions on the metal surface.…”

Section: Coating and Coating Damage Caused Corrosion And Cracking Of mentioning

confidence: 99%

An Industrial Perspective on Environmentally Assisted Cracking of Some Commercially Used Carbon Steels and Corrosion-Resistant Alloys

Ashida¹,

Daigo

Sugahara

2017

JOM

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Commercial metals and alloys like carbon steels, stainless steels, and nickelbased super alloys frequently encounter the problem of environmentally assisted cracking (EAC) and resulting failure in engineering components. This article aims to provide a perspective on three critical industrial applications having EAC issues: (1) corrosion and cracking of carbon steels in automotive applications, (2) EAC of iron-and nickel-based alloys in salt production and processing, and (3) EAC of iron-and nickel-based alloys in supercritical water. The review focuses on current industrial-level understanding with respect to corrosion fatigue, hydrogen-assisted cracking, or stress corrosion cracking, as well as the dominant factors affecting crack initiation and propagation. Furthermore, some ongoing industrial studies and directions of future research are also discussed.

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Zinc phosphate treatment of metals

Cited by 34 publications

References 13 publications

Advances in Automotive Conversion Coatings during Pretreatment of the Body Structure: A Review

Advances in Automotive Conversion Coatings during Pretreatment of the Body Structure: A Review

Anticorrosive interfacial coatings for metallic substrates

An Industrial Perspective on Environmentally Assisted Cracking of Some Commercially Used Carbon Steels and Corrosion-Resistant Alloys

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