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Paint Adhesion & the Metal Surface

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duplicate of paper in TIMF 41 (l964) but disc'n pp 394-6.

Paint adhesion on plastics & metals - studies using electrokinetic methods

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Table lists 4 methods with are encompassed by title, streaming potential, electro-osmosis, electrophoresis, sedimentation potential. Basic principles, equations and problems to which they are suited are listed. Discussion of zeta potential and its pH and other dependances. How zeta potential reflects surface modifications, e.g etching, plasma treatment etc. Examples include aluminium surfaces after various forms of etching etc. The method is advocated as a tool for surface engineering. 9 refs

Paint Adhesion over Chromium Plate

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The adhesion of paint to Cr plated surfaces was meas'd with the tape test. Water immersion and pencil hardness tests were also used. Some simple tests to characterise the quality of the underlying Cr include heavy breathing, air blow-off and detergent immersion, all of which are described.

Paint adhesion promoters

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Notes that paint performance can be adversely affected by poor adhesion, notably for high-solids or water-based coatings. A novel adhesion promoter is tested using a liquid epoxy system on different substrates including deliberately contaminated or rusted steel. Currently available adhesion promotion systems are briefly surveyed. Sketch shows concept of new promoter with reactive terminal groups bonding to steel. Three types of bonding are identified as playing a role in bonding organic coatings to metal substrates. Photos of scribed test panels demonstrate the action of the new promoter. 3 refs

Paint Adhesion to Contaminated Surfaces

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Using a newly developed variant of the scratch test (cross-hatch) for adhesion, the effect of surface contamination prior to application of organic coatings on their adhesion is reported. Infra-red spectrum shows zinc surface before & after cleaning. Table lists 6 outcomes of cross-hatch test & implications. Sketch shows new type of scratch test with resonance probe. Histogram shows results for various cleaned & uncleaned sheet(galvanised & other). Acoustic emission from painted surface of cleaned & uncleaned zinc sheet is shown. 4 refs

Paint Adhesion to Decorative Trim

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The use of a tape adhesion test is described and adhesion of paints to chromium-plated work, stainless steel, anodised Al and chromate conversion coatings is reported. The effect of sealing contaminants on paint adhesion is considered. 6 refs. Disc'n Vol 54 p. 403.

Paint adhesion, corrosion control and interfacial chemistry

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Paint ageing processes suggest new formulations

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Ageing processes in paints are generally associated with low MW components. A study of these reactions opens a door to new formulations in which these processes can be delayed.

Paint ageing processes suggest new formulations

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Review of ageing processes in decorative & other paint types, which can mainly be traced back to low molecular weight components. Reformulation to minimise these appears to be option for overcoming the problem.

Paint an engineering material

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Requirements of decorative coatings, maintenance coatings, industrial finishes and new technologies are mentioned. Idea of paint as transient decorative material has changed to expect other functional characteristics like protection against corrosion, fire retardance, electrical insulation, suppression of biological growth, visibility at night, etc.

Paint analysis.

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ISBN 978-3-86630-912-8 Book discusses modern analytical techniques and their applications in the coatings industry. The methods may be used for performing failure analysis, production control and quality control. Covers major methods of analysis including optical light microscopy, infrared spectroscopy, time-of-flight secondary ion mass spectroscopy, scanning electron microscopy, electron microanalysis, and X-ray photoelectron spectroscopy, explaining the principles, instrumentation, sample preparation, quantification and applications. This book is also written to be used for troubleshooting, explaining why a coating or production failure has occurred, suggesting analytical solutions. Equally useful for educational & training and useful for engineers and technicians engaged in coatings production and application, as well as those involved in substrate production.

Paint and Coating Remover

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Paint and Coating Remover

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A composition useful as a paint remover comprises 10-90 wt. % dialkyl carbonate 0.2-90 wt. % dibasic ester, 0.1-20 wt. % of hydrogen peroxide, and 0.1-30 wt. % water.

Paint and degreasing emissions

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Notes from EPA/AES conference, Kissimmee, FL, on dealing with volatile organic compounds from organic finishing operations, emissions from vapour degreasers and computerised paint curing.

Paint and powder coating features

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Equipment for powder coating of metallic or effect powders requires special features which are here described. Sketch shows plant layout. New high-solids paint system for two-component PUR produces solvent emissions comparable to those of water-based paints and features increased pot life time. Drying times are comparable with conventional primers and the coating has high UV resistance as shown in a graph.