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Tài liệu Corrosion control through organic coatings docx
... Certain anticorrosion coating subspecialties fall outside the scope of this work, including those dealing with automotive, airplane, and marine coatings; powder coatings; and coatings for cathodic ... diffuse through organic coatings of reasonable thickness is greater than that needed for the corrosion process [2–8] Table 1.1 shows the permeation rates of water vapor through several coatings ... in the cured coating, whereas pigments in barrier coatings must be inert Filler pigments must be inert at all times, of course, and the coloring of a coating should stay constant throughout its...
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Corrosion Control Through Organic Coatings P1 pps
... Certain anticorrosion coating subspecialties fall outside the scope of this work, including those dealing with automotive, airplane, and marine coatings; powder coatings; and coatings for cathodic ... diffuse through organic coatings of reasonable thickness is greater than that needed for the corrosion process [2–8] Table 1.1 shows the permeation rates of water vapor through several coatings ... in the cured coating, whereas pigments in barrier coatings must be inert Filler pigments must be inert at all times, of course, and the coloring of a coating should stay constant throughout its...
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Corrosion Control Through Organic Coatings P2 potx
... Wednesday, March 1, 2006 10:55 AM 20 Corrosion Control Through Organic Coatings 2.2.3.1 Moisture-Cure Urethanes Moisture-cure urethanes are one-component coatings The resin has at least two isocyanate ... Alkyd coatings are therefore not suitable for immersion service 2.2.5.4 Brittleness Alkyds cure through a reaction of the unsaturated fatty acid component with oxygen in the atmosphere Once the coating ... of these coatings are: • • • • Ability to tolerate higher temperatures than organic coatings (inorganic ZRPs typically tolerate 700° to 750°F) Excellent corrosion protection Require topcoatings...
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Corrosion Control Through Organic Coatings Part 11 potx
... Page 150 Friday, February 3, 2006 3:01 PM 150 Corrosion Control Through Organic Coatings performance, or even relative ranking, of coatings in most applications, it is the most frequently specified ... March 1, 2006 12:43 PM 154 Corrosion Control Through Organic Coatings 54 Appleman, B.R., Weaver, R.E.F and Bruno, J.A., Performance of Alternate Coatings in the Environment (PACE) Volume III: ... passive film as it does in the field • For inhibitive coatings, chlorides adsorb on the metal surface, where they prevent passivation • For barrier coatings, the osmotic forces are much less than in...
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Corrosion Control Through Organic Coatings Part 10 pot
... part of the coating system This can occur cohesively within a coating layer; adhesively between coating layers, especially if the glue has created a weak boundary layer within the coating; or ... PROPERTIES Coatings, being polymer-based, are naturally highly resistant to the flow of electricity This fact is utilized to measure water uptake by and transport through the coating The coating ... interactions between the coating and the substrate; extraneous contributions include internal stresses in the coating and defects or extraneous processes introduced in the coating as a result of...
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Corrosion Control Through Organic Coatings Part 9 ppt
... 4:54 PM 120 Corrosion Control Through Organic Coatings It should be noted that the 90 g/m2 zinc coating in this study is hot-dipped galvanized, and the two thinner coatings are electrogalvanized ... coatings is shown in Table 7.2 The two sites identified the same best and worst coating, but ranked the four in between differently Another study of coatings exposed at various field stations throughout ... possible that, for a coating with a slower desorption rate, the drying time in each cycle is shorter than the time needed by the coating for complete desorption In such cases, the coating that desorbs...
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Corrosion Control Through Organic Coatings Part 8 ppt
... osmotic forces drive water through the coating to the alkaline solution, the coating is deformed upward — a blister begins At the coating- metal solution interface, the coating experiences peel ... February 3, 2006 12:38 PM 104 Corrosion Control Through Organic Coatings coating in the dissolved state Diffusion is how mobile the water molecules are in the coating [15] The permeability coefficient, ... the coating s internal stresses — both tensile and compressive — caused by wetting and drying the coating As a coating takes up water, it swells, causing compressive stresses in the film As the coating...
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Corrosion Control Through Organic Coatings Part 7 doc
... 7278_C004.fm Page 84 Friday, February 3, 2006 12:37 PM 84 Corrosion Control Through Organic Coatings Paul, S., Surface Coatings Science and Technology 2nd ed John Wiley & Sons, Chichester, England, ... Congress: Coatings Systems Bridges, University of Missouri, Rolla, MO, 1982 19 West, J., presentation, UK Corrosion ’85, Harrogate, 4-6 November 1985 Cited in Thomas, N.L., Proc PRA Symposium ‘‘Coatings ... Group, LLC 7278_C005.fm Page 86 Friday, February 3, 2006 12:38 PM 86 Corrosion Control Through Organic Coatings 5.1.1 CHEMICAL ANALYSIS TECHNIQUES FOR HEAVY METALS Several techniques are available...
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Corrosion Control Through Organic Coatings Part 6 potx
... 7278_C004.fm Page 68 Friday, February 3, 2006 12:37 PM 68 Corrosion Control Through Organic Coatings 4.1 INTRODUCTION TO BLAST CLEANING By far, the most common pretreatment for steel ... Group, LLC 7278_C004.fm Page 70 Friday, February 3, 2006 12:37 PM 70 Corrosion Control Through Organic Coatings the heavy mineral sands are effective for blast cleaning new steel but are not ... Group, LLC 7278_C004.fm Page 74 Friday, February 3, 2006 12:37 PM 74 Corrosion Control Through Organic Coatings Sharp [8] lists nitrites, amines, and phosphates as common materials used to make...
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Corrosion Control Through Organic Coatings Part 5 docx
... by Organic Coatings, Electrochem Soc., 1989, 451 © 2006 by Taylor & Francis Group, LLC 7278_C002.fm Page 52 Wednesday, March 1, 2006 10:55 AM 52 Corrosion Control Through Organic Coatings 32 ... March 1, 2006 10:55 AM 54 Corrosion Control Through Organic Coatings 118 Bishop, R.R., Brit Corrosion J., 9, 149, 1974 119 Various authors, in Surface Coatings, Vol 1, Waldie, J.M., Ed., Chapman ... water Many alkyd and epoxy paints are examples of this type of coating 3.1.3 AQUEOUS DISPERSION COATINGS In a aqueous dispersion coatings, the polymer is not water–soluble at all Rather, it exists...
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Corrosion Control Through Organic Coatings Part 4 ppsx
... particular interest, therefore, in overcoating aged LBP A major requirement of successful overcoating is compatibility between the old coating and the new coating; this is greatly enhanced by using ... Composition of the Anticorrosion Coating 39 they suggest, react with aggressive species that are permeating into the coating and thus prevent them from reaching the metal -coating interface An interesting ... the coating to form insoluble zinc salts As they precipitate, these salts fill in the pores in the coating, reducing permeability of the film [84] Oxygen reduction Molecular oxygen diffusing through...
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Corrosion Control Through Organic Coatings Part 3 doc
... Wednesday, March 1, 2006 10:55 AM 20 Corrosion Control Through Organic Coatings 2.2.3.1 Moisture-Cure Urethanes Moisture-cure urethanes are one-component coatings The resin has at least two isocyanate ... Alkyd coatings are therefore not suitable for immersion service 2.2.5.4 Brittleness Alkyds cure through a reaction of the unsaturated fatty acid component with oxygen in the atmosphere Once the coating ... of these coatings are: • • • • Ability to tolerate higher temperatures than organic coatings (inorganic ZRPs typically tolerate 700° to 750°F) Excellent corrosion protection Require topcoatings...
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Corrosion Control Through Organic Coatings Part 2 ppt
... Certain anticorrosion coating subspecialties fall outside the scope of this work, including those dealing with automotive, airplane, and marine coatings; powder coatings; and coatings for cathodic ... diffuse through organic coatings of reasonable thickness is greater than that needed for the corrosion process [2–8] Table 1.1 shows the permeation rates of water vapor through several coatings ... in the cured coating, whereas pigments in barrier coatings must be inert Filler pigments must be inert at all times, of course, and the coloring of a coating should stay constant throughout its...
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Corrosion Control Through Organic Coatings Part 1 docx
... Philippe Marcus and Florian Mansfeld Paint and Coatings: Applications and Corrosion Resistance, Philip A Schweitzer Corrosion Control Through Organic Coatings, Amy Forsgren © 2006 by Taylor & Francis ... Forsgren, Amy Corrosion control through organic coatings / Amy Forsgren p cm Includes bibliographical references and index ISBN 0-8493-7278-X (alk paper) Protective coatings Corrosion and anti-corrosives ... need a sound working knowledge of different coating types and some orientation in how to test coatings for corrosion protection Buyers or specifiers of coatings, who need to know quickly which tests...
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Corrosion Control Through Organic Coatings Part 0 pps
... Philippe Marcus and Florian Mansfeld Paint and Coatings: Applications and Corrosion Resistance, Philip A Schweitzer Corrosion Control Through Organic Coatings, Amy Forsgren © 2006 by Taylor & Francis ... Forsgren, Amy Corrosion control through organic coatings / Amy Forsgren p cm Includes bibliographical references and index ISBN 0-8493-7278-X (alk paper) Protective coatings Corrosion and anti-corrosives ... need a sound working knowledge of different coating types and some orientation in how to test coatings for corrosion protection Buyers or specifiers of coatings, who need to know quickly which tests...
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Corrosion Control Through Organic Coatings Part 1 pdf
... Certain anticorrosion coating subspecialties fall outside the scope of this work, including those dealing with automotive, airplane, and marine coatings; powder coatings; and coatings for cathodic ... diffuse through organic coatings of reasonable thickness is greater than that needed for the corrosion process [2–8] Table 1.1 shows the permeation rates of water vapor through several coatings ... and powder coatings) Aluminium — not steel —is used as the substrate, and the coatings experience temperature extremes and ultraviolent loads that earth-bound structures and their coatings never...
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Corrosion Control Through Organic Coatings Part 2 pdf
... 12 Corrosion Control Through Organic Coatings and cured binder, through which water finds its easiest route to the metal surface It can also cover pores in the bulk of the coating, blocking this ... particular interest, therefore, in overcoating aged LBP A major requirement of successful overcoating is compatibility between the old coating and the new coating; this is greatly enhanced by using ... range of coatings, from very-low-viscosity epoxy sealers (for penetration of crevices) to exceptionally thick epoxy mastic coatings 2.2.1.3.1 Mastics Mastics are high-solids, high-build epoxy coatings...
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Corrosion Control Through Organic Coatings Part 3 potx
... water Many alkyd and epoxy paints are examples of this type of coating 3.1.3 AQUEOUS DISPERSION COATINGS In a aqueous dispersion coatings, the polymer is not water–soluble at all Rather, it exists ... 7278_C003.fm Page 64 Friday, February 3, 2006 12:36 PM 64 Corrosion Control Through Organic Coatings after application of the coating The expectation was that the acidic or basic components, or both, ... 3.1.2 AQUEOUS EMULSION COATINGS An emulsion is a dispersion of one liquid in another; the best-known example is milk, in which fat droplets are emulsified in water In an emulsion coating, a liquid...
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Corrosion Control Through Organic Coatings Part 4 potx
... 7278_C004.fm Page 84 Friday, February 3, 2006 12:37 PM 84 Corrosion Control Through Organic Coatings Paul, S., Surface Coatings Science and Technology 2nd ed John Wiley & Sons, Chichester, England, ... Group, LLC 7278_C004.fm Page 70 Friday, February 3, 2006 12:37 PM 70 Corrosion Control Through Organic Coatings the heavy mineral sands are effective for blast cleaning new steel but are not ... Group, LLC 7278_C004.fm Page 72 Friday, February 3, 2006 12:37 PM 72 Corrosion Control Through Organic Coatings TABLE 4.2 Levels of Selected Compounds/Elements Found in By-Product Abrasives Blasting...
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Corrosion Control Through Organic Coatings Part 5 ppsx
... 7278_C005.fm Page 86 Friday, February 3, 2006 12:38 PM 86 Corrosion Control Through Organic Coatings 5.1.1 CHEMICAL ANALYSIS TECHNIQUES FOR HEAVY METALS Several techniques are available ... technique is that it can be used to analyze an entire coating system, without the need to separate and study each layer Also, because the entire coating layer is dissolved in the acid solution, this ... stratification of heavy metals throughout the layer That is, there is no need to worry about whether the lead is contained mostly in the bulk of the layer, at the coatingmetal interface, or at...
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