Evaluation of Different Zinc Rich Primer Coatings for Enhancing the Corrosion Resistance of Pipeline Steel to Internal Corrosion PDF Download
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Author: Jingyang He
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This thesis investigates the properties of different coating systems to protect against corrosion for the steel substrate under environments of oil and gas. The coating systems were divided in two main parts according to compositions: the organic zinc and the inorganic zinc system. For each system, steel panels coated with only primers and samples coated with primers, intermediate coats and topcoats were tested. Electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) tests were used to investigate the performance of the coatings. On one side of each panel, a pinhole defect was introduced, and the tests were performed for 3 months. The two multilayer systems were then compared with TESLAN 1101 ZN-CNT low VOC epoxy primer along with topcoat. On the other side of the panels, the tests were run for 4 months to examine their performance with no defect. The solution used contained 2000 ppm of chloride concentration with a pH value of 3.5, and was refreshed weekly. For panels coated with primers only, the results showed that they all formed corrosion products, which protected the steel substrate as barriers. For panels coated with the multilayer systems and no defect, the electrolyte slowly penetrated into the coatings, but the coatings were still providing good protection against corrosion. The multilayer systems all performed better than primers only in terms of protecting steel, indicating the significance of topcoat. With pinholes, primers show very similar properties, while multilayer coating systems show that the existence of pinholes helped activate zinc as sacrificial metal. When comparing the multilayer systems with pinholes, the results show that the existence of carbo nanotube did not significantly improve the performance of coating. Among all the coating systems, inorganic zinc rich multilayer systems had the best protection against corrosion.
Author: Jingyang He
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This thesis investigates the properties of different coating systems to protect against corrosion for the steel substrate under environments of oil and gas. The coating systems were divided in two main parts according to compositions: the organic zinc and the inorganic zinc system. For each system, steel panels coated with only primers and samples coated with primers, intermediate coats and topcoats were tested. Electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) tests were used to investigate the performance of the coatings. On one side of each panel, a pinhole defect was introduced, and the tests were performed for 3 months. The two multilayer systems were then compared with TESLAN 1101 ZN-CNT low VOC epoxy primer along with topcoat. On the other side of the panels, the tests were run for 4 months to examine their performance with no defect. The solution used contained 2000 ppm of chloride concentration with a pH value of 3.5, and was refreshed weekly. For panels coated with primers only, the results showed that they all formed corrosion products, which protected the steel substrate as barriers. For panels coated with the multilayer systems and no defect, the electrolyte slowly penetrated into the coatings, but the coatings were still providing good protection against corrosion. The multilayer systems all performed better than primers only in terms of protecting steel, indicating the significance of topcoat. With pinholes, primers show very similar properties, while multilayer coating systems show that the existence of pinholes helped activate zinc as sacrificial metal. When comparing the multilayer systems with pinholes, the results show that the existence of carbo nanotube did not significantly improve the performance of coating. Among all the coating systems, inorganic zinc rich multilayer systems had the best protection against corrosion.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 23
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Book Description
Zinc-Rich Primer Evaluation. OBJECTIVE: Improve corrosion performance and reduce overall life cycle costs of Marine Corps metallic components by using Zn-rich coatings on steel. TEST EXPECTATIONS: Degree of galvanic corrosion/protection. * Best Zn-rich coating corrosion performance (function of time to recoat).
Author: Frank C. Porter
Publisher: CRC Press
ISBN: 9780824792138
Category : Mathematics
Languages : en
Pages : 538
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Book Description
A cornerstone reference in the field, this work analyzes available information on the corrosion resistance of zinc and its alloys both as solid materials and as coatings on steel, detailing the corrosion resistance of zinc in atmospheric, aqueous, underground and chemical environments. Corrosion Resistance of Zinc and Zinc Alloys illustrates the numerous benefits of zinc and duplex coatings and presents practical case histories of their use.
Author: C. J. Slunder
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 216
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Book Description
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: Alexander John Carmichael
Publisher:
ISBN: 9780725901141
Category : Steel
Languages : en
Pages : 10
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Book Description
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1584
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Book Description
Author: Research Service, Incorporated
Publisher:
ISBN:
Category : Corrosion and anti-corrosives
Languages : en
Pages : 94
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Book Description
Author: Ramesh Singh
Publisher: Gulf Professional Publishing
ISBN: 0124046908
Category : Technology & Engineering
Languages : en
Pages : 254
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Book Description
A variable game changer for those companies operating in hostile, corrosive marine environments, Corrosion Control for Offshore Structures provides critical corrosion control tips and techniques that will prolong structural life while saving millions in cost. In this book, Ramesh Singh explains the ABCs of prolonging structural life of platforms and pipelines while reducing cost and decreasing the risk of failure. Corrosion Control for Offshore Structures places major emphasis on the popular use of cathodic protection (CP) combined with high efficiency coating to prevent subsea corrosion. This reference begins with the fundamental science of corrosion and structures and then moves on to cover more advanced topics such as cathodic protection, coating as corrosion prevention using mill applied coatings, field applications, and the advantages and limitations of some common coating systems. In addition, the author provides expert insight on a number of NACE and DNV standards and recommended practices as well as ISO and Standard and Test Methods. Packed with tables, charts and case studies, Corrosion Control for Offshore Structures is a valuable guide to offshore corrosion control both in terms of its theory and application. Prolong the structural life of your offshore platforms and pipelines Understand critical topics such as cathodic protection and coating as corrosion prevention with mill applied coatings Gain expert insight on a number of NACE and DNV standards and recommended practices as well as ISO and Standard Test Methods.
Author: Diana Petronela Burduhos-Nergis
Publisher: Materials Research Forum LLC
ISBN: 1644901668
Category : Technology & Engineering
Languages : en
Pages : 152
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Book Description
The corrosion protection of metallic materials is of great importance in many fields, especially also when it comes to environmental issues. The book focuses on organic and inorganic coatings, metallic coatings and new methods for the deposition of protective thin layers. Coating techniques and methods for testing and assessing corrosion behavior are presented. Keywords: Anticorrosion Coating, Metal Corrosion, Electrochemical Corrosion , Biochemical Corrosion, Atmospheric Corrosion, Underground Corrosion, Aqueous Corrosion, Corrosion Involving Mechanical Stress, Microbiological Corrosion, Metal Passivation, Metallic Layers, Spray Metal Coatings, Diffusion Coatings, Cladding Coatings, Inorganic Layers, Organic Layers, Phosphating, Oxidation, Chromating, Enamelling, Painting, Varnishing, Bituminous Coatings, Protective Thin Layers, PVD Method, Layers by Thermal Evaporation, Cathodic Spray Deposition, CVD Method, Wear Resistant Thin Layers, Decorative Thin Film Deposition.
