Performance Characteristics of Zinc-rich Coatings Applied to Carbon Steel PDF Download
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Author: William J. Paton
Publisher:
ISBN:
Category : Carbon steel
Languages : en
Pages : 92
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Book Description
A program was conducted to evaluate the performance of topcoated and untopcoated zinc-rich coatings. Sacrificial coatings of this type are required for protecting carbon steel structures from the aggressive KSC sea coast environment. A total of 59 commercially available zinc-rich coatings and 47 topcoated materials were exposed for an 18-month period. Test panels were placed in special racks placed approximately 30.5 m (100 feet) above the high tide line at the KSC Corrosion Test Site. Laboratory tests to determine the temperature resistance, abrasion resistance, and adhesion of the untopcoated zinc-rich coatings were also performed. It has been concluded that: (1) The inorganic types of zinc-rich coatings are far superior to the organic types in the KSC environment. (2) Organic zinc-rich coatings applied at 0.1 - 0.15 mm (4-6 mils) film thickness provide better corrosion protection than when applied at the manufacturers' recommended nominal film thickness of .08 mm (3 mils). (3) Topcoats are not necessary, or even desirable, when used in conjunction with zinc-rich coatings in the KSC environment. (4) Some types of inorganic zinc-rich coatings require an extended outdoor weathering period in order to obtain adequate mechanical properties. and (5) A properly formulated inorganic zinc-rich coating is not affected by a 24-hour thermal exposure to 400 C (752 F).
Author: William J. Paton
Publisher:
ISBN:
Category : Carbon steel
Languages : en
Pages : 92
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Book Description
A program was conducted to evaluate the performance of topcoated and untopcoated zinc-rich coatings. Sacrificial coatings of this type are required for protecting carbon steel structures from the aggressive KSC sea coast environment. A total of 59 commercially available zinc-rich coatings and 47 topcoated materials were exposed for an 18-month period. Test panels were placed in special racks placed approximately 30.5 m (100 feet) above the high tide line at the KSC Corrosion Test Site. Laboratory tests to determine the temperature resistance, abrasion resistance, and adhesion of the untopcoated zinc-rich coatings were also performed. It has been concluded that: (1) The inorganic types of zinc-rich coatings are far superior to the organic types in the KSC environment. (2) Organic zinc-rich coatings applied at 0.1 - 0.15 mm (4-6 mils) film thickness provide better corrosion protection than when applied at the manufacturers' recommended nominal film thickness of .08 mm (3 mils). (3) Topcoats are not necessary, or even desirable, when used in conjunction with zinc-rich coatings in the KSC environment. (4) Some types of inorganic zinc-rich coatings require an extended outdoor weathering period in order to obtain adequate mechanical properties. and (5) A properly formulated inorganic zinc-rich coating is not affected by a 24-hour thermal exposure to 400 C (752 F).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 600
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 704
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Book Description
Author: Ruth Lizak
Publisher:
ISBN:
Category : Corrosion and anti-corrosives
Languages : en
Pages : 52
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Book Description
Author: United States. Federal Highway Administration. Offices of Research and Development
Publisher:
ISBN:
Category :
Languages : en
Pages : 332
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Book Description
Author: Samuel Benavides
Publisher: Elsevier
ISBN: 1845695534
Category : Technology & Engineering
Languages : en
Pages : 325
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Book Description
Corrosion control in the aerospace industry has always been important, but is becoming more so with the ageing of the aircraft fleet. Corrosion control in the aerospace industry provides a comprehensive review of the subject with real-world perspectives and approaches to corrosion control and prevention. Part one discusses the fundamentals of corrosion and the cost of corrosion with chapters on such topics as corrosion and the threat to aircraft structural integrity and the effect of corrosion on aluminium alloys. Part two then reviews corrosion monitoring, evaluation and prediction including non-destructive evaluation of corrosion, integrated health and corrosion monitoring systems, modelling of corrosion and fatigue on aircraft structures and corrosion control in space launch vehicles. Finally, Part three covers corrosion protection and prevention, including chapters which discuss coating removal techniques, novel corrosion schemes, greases and their role in corrosion control and business strategies in fleet maintenance. With its distinguished editor and team of expert contributors, Corrosion control in the aerospace industry is a standard reference for everyone involved in the maintenance and daily operation of aircraft, as well as those concerned with aircraft safety, designers of aircraft, materials scientists and corrosion experts. Discusses the fundamentals of corrosion and the cost of corrosion to the aerospace industry Examines the threat corrosion poses to aircraft structural integrity and the effect of corrosion on the mechanical behaviour of aircraft Reviews methods for corrosion monitoring, evaluation and prediction examining both current practices and future trends
Author: Berdimurodov Elyor Tukhlievich
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3111071758
Category : Technology & Engineering
Languages : en
Pages : 210
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Book Description
Recently, surface-engineered and modified nanomaterials have been developed as corrosion inhibitors for different metals alloys in coating and solution phases. This book covers current emerging trends and applications in nanomaterials and nanotechnologies and their applications in corrosion prevention. It offers synthesis, surface modification for enhanced dispersibility and protection, composite formation and their anticorrosive applications.
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1252
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Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Author: J. Peter Ault
Publisher:
ISBN:
Category : Bridges, Iron and steel
Languages : en
Pages : 72
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Book Description
This report presents the results of a test program designed to investigate, in the laboratory, possible causes for failure of water-based inorganic zinc (WBIOZ) coatings. Failures observed in the field have consisted of either topcoat delamination or the appearance of "freckle rusting" in the cured WBIOZ primer. There are many hypotheses regarding the cause of these failures, but no sufficient explanation exists. Furthermore, there are no proven means to ensure that failures do not occur. The general consensus of the literature is that the failures relate to improper cure of the WBIOZ primer. This improper curing is further hypothesized to relate to environmental conditions. The project initially focused on identifying what relationship, if any, existed between environmental conditions and the observed failure modes. Since a definitive relationship did not exist, further testing was conducted to investigate the effects of substrate salt contamination, improper zinc content in the mixed coating, and the effects of rinsing the primer before topcoating. This report presents the more practical results of the study
Author: Chandrabhan Verma
Publisher: Elsevier
ISBN: 032390713X
Category : Technology & Engineering
Languages : en
Pages : 286
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Book Description
Handbook of Science and Engineering of Green Corrosion Inhibitors wraps up new developments in green corrosion inhibitors and their current applications. The book provides a comprehensive overview of green corrosion inhibitors such as plant extracts, chemical medicines, natural polymers, synthetic green compounds, carbohydrates, amino acids, oleochemicals etc. that can cost-effectively minimize corrosive damage. It handles several green compounds that are used as anticorrosive materials for different metals and alloys in a versatile corrosive environment. Handbook of Science and Engineering of Green Corrosion Inhibitors addresses fundamental characteristics of green corrosion inhibition. It deals with the economic impact of corrosion, forms of corrosion and its assessment and classification of corrosion inhibitors. The book covers a broad range of applications in green corrosion inhibition and concludes with new emerging trends in corrosion protection such as high temperature corrosion and its protection and nanomaterials as corrosion inhibitors. Provides an overview of environmentally sustainable (green) corrosion inhibitors utilized in modern industrial platforms Evaluates corrosion inhibitors as prime option for sustainable and transformational opportunities Serves as a valuable reference for scientists and engineers who are searching modern design for corrosion inhibitors Covers both synthetic and natural environmental-friendly corrosion inhibitors
