Download or read book Corrosion Resistance of Fastener Coatings written by Stanley R. Brown and published by . This book was released on 1972 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coating materials are needed to replace electrodeposited cadmium on steel fasteners for use in high performance aircraft. A study was made to compare corrosion resistance of ten experimental coatings, mostly aluminum-rich types, with cadmium. Several experimental coatings provided high resistance to 5% NaCl salt fog and NaCl-SO2 salt fog exposure tests. Paint adhesion was excellent on all fastener coatings with an epoxy primer/polyurethane topcoat system. Cadmium and the other fastener materials examined in this study varied widely in coating thickness on different fastener surface areas. (Author).
Download or read book Protective Coatings for Fasteners written by Fasteners Committee and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Information Report is provided as an advisory guide. Careful discretion as to application is recommended. The content has been presented as accurately as possible, but responsibility for its application lies with the user. It covers finishes applied to fasteners and related topics, corrosion resistance, lubricity, electrical grounding, ultraviolet light, and embrittlement.Table 1 lists these coatings and their properties so that finish selection can be reasonably made in accordance with known and anticipated fastener assembly applications.Application of protective coatings will affect fastener dimensions. This is especially critical for the thread fit of mating parts because the pitch diameter increases by four times the coating thickness. Explanation is covered in Section 5. This Information Report covers technology, products, or processes for which technical expertise no longer resides in the owning committee. Current finish specifications for additional information include the following: ASTM F1941/1941M (Standard Specification for Electrodeposited Coatings on Mechanical Fasteners, Inch and Metric); ASTM F2833 (Standard Specification for Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum Organic/Inorganic Type); ASTM F3019/F3019M (Standard Specification for Chromium Free Zinc-Flake Composite, with or without Integral Lubricant, Corrosion Protective Coatings for Fasteners); ISO 4042 (Fasteners - Electroplating Systems), ISO 10683 (Fasteners - Non-Electrolytically Applied Coatings), ISO 10684 (Fasteners - Hot Dip Galvanized Coatings), ISO 16048 (Passivation of Corrosion-Resistant Stainless-Steel Fasteners), and ISO 11408 (Chemical Conversion Coatings - Black Oxide Coating on Iron and Steel - Specification and Test Methods).
Download or read book Fastener Design Manual written by Richard T. Barrett and published by . This book was released on 2011-07-27 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual was written for design engineers to enable them to choose appropriate fasteners for their designs. Subject matter includes fastener material selection, platings, lubricants, corrosion, locking methods, washers, inserts, thread types and classes, fatigue loading, and fastener torque. A section on design criteria covers the derivation of torque formulas, loads on a fastener group, combining simultaneous shear and tension loads, pullout load for tapped bales, grip length, head styles, and fastener strengths. The second half of this manual presents general guidelines and selection criteria for rivets and lockbolts. To the casual observer the selection of bolts, nuts, and rivets for a design should be a simple task. In reality it is a difficult task, requiring careful consideration of temperature, corrosion, vibration, fatigue, initial preload, and many other factors. The intent of this manual is to present enough data on bolt and rivet materials, finishes, torques, and thread lubricants to enable a designer to make a sensible selection for a particular design. Lockouts, washers, locking methods, inserts, rivets, and tapped holes arc also covered. Bolts can be made froni many materials, but most bolts are made of carbon steel, alloy steel, or stainless steel. Stainless steels include both iron- and nickel-based chromium alloys. Titanium and aluminum bolts have limited usage, primarily in the aerospace industry. Carbon steel is the cheapest and most common bolt material. Most hardware stores sell carbon steel bolts, which are usually zinc plated to resist corrosion_ The typical ultimate strength of this bolt material is 55 ksi. An alloy steel is a high-strength carbon steel that can be heat treated up to 300 ksi. However, it is not corrosion resistant and must therefore have some type of coating to protect it from corrosion. Aerospace alloy steel fasteners are usually cadmium plated for corrosion protection_ Bolts of stainless steel (cREs) are available in a variety of alloys with ultimate strengths from 70 to 220 ksi. The major advantage of using CRES is that it normally requires no protective coating and has a wider service temperature range than plain carbon or alloy steels. A partial listing of bolt materials is given in table 1. The following precautions are to be noted: (1) The bolt plating material is usually the limiting factor on maximum service temperature. (2) Carbon steel and alloy steel are unsatisfactory (become brittle) at temperatures below -65 'F. (3) Hydrogen embrittlement is a problem with most common methods of plating, unless special procedures are used. (This subject is covered more fully in the corrosion section.) (4) Series 400 CRES contains only 12 percent chromium and thus will corrode in some environments, (5) The contact of dissimilar materials can create galvanic corrosion, which can become a major problem. (Galvanic corrosion is covered in a subsequent section of this manual.) Platings and Coatings Most plating processes are electrolytic and generate hydro-gen. Thus, most plating processes require baking after plating at a temperature well below the decomposition temperature of the plating material to prevent hydrogen ernhrittlernent. However, heating the plating to its decomposition temperature can generate free hydrogen again. Thus, exceeding the safe operating temperature of the plating can cause premature fastener failure due to hydrogen embrittlement as well as loss of corrosion protection. (A summary of platings and coatings is given in table II.) Cadmium Plating The most common aerospace fastener plating material is cadmium. Plating is done by electrodeposition and is easy to accomplish. However, cadmium-plated parts must be baked at 375 "F for 23 hours, within 2 hours after plating, to prevent hydrogen embrittlement. Since cadmium melts at 600 "F, its useful service temperature limit is 450 'F.
Download or read book Advanced Coatings for Corrosion Protection written by Wolfram Fürbeth and published by MDPI. This book was released on 2021-01-15 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion is a significant issue in many industrial fields. Among other strategies, coatings are by far the most important technology for corrosion protection of metallic surfaces. The Special Issue “Advanced Coatings for Corrosion Protection” has been launched as a means to present recent developments in any type of advanced coating for corrosion protection. This book compiles 15 contributions on metallic, inorganic, polymeric and nanoparticle enhanced coatings that provide corrosion protection as well as other functionalities.
Download or read book The Performance of Three Alternative Coatings to Electroplated Cadmium for Corrosion Protection in Fastener Applications written by and published by . This book was released on 1999 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Army uses cadmium over a broad range of applications, including the production, maintenance, and repair of weapons systems and related components. The useful properties of this element have made it the number one choice for fasteners and similar components where corrosion resistance and lubricity are a concern. However, cadmium is a known carcinogen and poses health risks to those coming in contact with it. Executive Order 12856, "Federal Compliance With Right-to-Know Laws and Pollution Prevention Requirements," was enacted in 1993 with the intent of reducing the total release of toxic chemicals into the environment by 50% by 1999. As such, intense research efforts have been underway to develop a coating or coating system that provides similar, if not better, properties than cadmium. ARL examined three alternatives to cadmium for corrosion protection in AH-64 fastener applications, including ion-vapor-deposited (IVD) aluminum, a MIL-T-83483 antiseize compound, and a MIL-C-16173 corrosion preventative compound. It was concluded that the antiseize compound and the corrosion preventative compound were not adequate replacements for cadmium based upon unacceptable fastener and aluminum block corrosion. IVD was deemed comparable to cadmium based upon the torque values, fastener corrosion, and block corrosion results.
Download or read book Organic Coated Fasteners and Their Corrosion Resistance written by Charles Robert Williams and published by . This book was released on 1985 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coatings on Metal Fasteners Specifications for Electroplated Zinc Coatings written by British Standards Institute Staff and published by . This book was released on 2009-08-31 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coatings, Metal coatings, Metals, Fasteners, Threaded fasteners, Threads, Electroplating, Zinc, Protective coatings, Corrosion-resistant materials, Thickness, Thickness measurement, Corrosion resistance, Designations, Conversion coating, Chromates, Thread pitch
Download or read book The Performance of Three Alternative Coatings to Electroplated Cadmium for Corrosion Protection in Fastener Applications written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Army uses cadmium over a broad range of applications, including the production, maintenance, and repair of weapons systems and related components. The useful properties of this element have made it the number one choice for fasteners and similar components where corrosion resistance and lubricity are a concern. However, cadmium is a known carcinogen and poses health risks to those coming in contact with it. Executive Order 12856, "Federal Compliance With Right-to-Know Laws and Pollution Prevention Requirements," was enacted in 1993 with the intent of reducing the total release of toxic chemicals into the environment by 50% by 1999. As such, intense research efforts have been underway to develop a coating or coating system that provides similar, if not better, properties than cadmium. ARL examined three alternatives to cadmium for corrosion protection in AH-64 fastener applications, including ion-vapor-deposited (IVD) aluminum, a MIL-T-83483 antiseize compound, and a MIL-C-16173 corrosion preventative compound. It was concluded that the antiseize compound and the corrosion preventative compound were not adequate replacements for cadmium based upon unacceptable fastener and aluminum block corrosion. IVD was deemed comparable to cadmium based upon the torque values, fastener corrosion, and block corrosion results
Download or read book Corrosion Resist Coatings written by Ichiro Suzuki and published by CRC Press. This book was released on 1989-07-17 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the selection and application of coatings used widely in natural environments, including metallic, inorganic, and organic coatings. It focuses on the protective abilities of coatings for various environments, particularly environments characterized by moisture and water.
Download or read book Passivation of Corrosion Resistant Stainless Steel Fasteners written by British Standards Institute Staff and published by . This book was released on 2003-06-20 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fasteners, Stainless steels, Steels, Corrosion resistance, Corrosion protection, Passivation
Download or read book Corrosion Resistance of Zinc and Zinc Alloys written by Frank C. Porter and published by CRC Press. This book was released on 1994-06-29 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Coatings for Corrosion Protection written by M. Rohwerder and published by The Electrochemical Society. This book was released on 2012 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Bolts and Bolted Joints written by John Bickford and published by CRC Press. This book was released on 1998-04-28 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting time-tested standard as well as reliable emerging knowledge on threaded fasteners and joints, this book covers how to select parts and materials, predict behavior, control assembly processes, and solve on-the-job problems. It examines key issues affecting bolting in the automotive, pressure vessel, petrochemical, aerospace, and structural steel industries. The editors have successfully created a useful rather than scholarly handbook with chapters written in a straightforward, how-to-do-it manner. Theory is discussed only when necessary and the handbook's logical organization and thorough index enhances its usefulness.
Download or read book Handbook of Corrosion Resistant Coatings written by D. J. De Renzo and published by William Andrew. This book was released on 1986 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fastener Design Manual written by Richard T. Barrett and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coatings and Surface Treatment for Corrosion and Wear Resistance written by Kenneth Norman Strafford and published by . This book was released on 1984 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chichester : Published for the Institution of Corrosion Science and Technology, Birmingham, by E. Horwood ; New York, N.Y., U.S.A. : Halsted Press [distributor], 1984.
Download or read book Corrosion Preventive Materials and Corrosion Testing written by S.K. Dhawan and published by CRC Press. This book was released on 2020-03-02 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides an extensive coverage of conjugated polymer based nano-composite coatings with advanced anti-corrosive properties. The book gives detailed explanation of corrosion testing methods and techniques to evaluate the corrosion resistance of the coatings. It includes elaborate discussion on classification of corrosion, electrochemistry of corrosion process, theories explaining the mechanism of corrosion and various corrosion testing standards. Electrochemical studies like open circuit potential (OCP) variation with time, potentiodynamic polarization, Electrochemical Impedance Spectroscopy (EIS) and accelerated corrosion testing are highlighted as important tools to extract information about the behavior of coatings under corrosive conditions. The book discusses epoxy-conjugated polymer based novel composite coating formulations, including aniline and o-toluidine, o-anisidine, phenetidine and pentafluoroaniline with appropriate fillers like SiO2, flyash, ZrO2 nanoparticles, and chitosan for the protection of metallic substrates. A general discussion on the self healing mechanism of epoxy-polypyrrole based biopolymer hybrid composite coatings is included in this book. This book provides a critical review on the conjugated polymer based composite coatings with superior corrosion resistance, good mechanical integrity, better adhesion properties and self healing ability under highly aggressive conditions which can be commercially used for the protection of metal substrates from corrosion.
