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76 results. per page 1 2 3 4 5 6 »

2 chamber cleaning machines compared

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Discussion of typical machine design & construction, cycle times, in-line or parallel design, throughput capacity etc.

2 component painting of metals & plastics - plant & operating

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Details of plant incl. engineering drawing of piston-type dosing pump and sketch showing operation of gearwheel (tooth wheel) dosing unit. Difference in valve configuration for manual & automatic operation on 2-component lines are shown. Proportional valves can be used. Selection criteria in choosing new plant are highlighted. Triangular diagram illustrates conflict between coating quality, cost-effectiveness and environmental performance. A case study is summarised.

2 Years Experience with Black Chromated Zinc Iron Electrodeposited alloy

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Article based on Volkswagen experience deals with rack & barrel plated parts. Histograms show salt spray test hours for black chromated Zn, Zn-Fe with & w/o heat treatment at 100°C for 5 hrs. SEM shows field-oriented structure in deposit cross-section. Graph plots corrosion to white rust vs. Fe content - max resistance occurs at ca 0.7% Fe. However barrel process times for an 8µm coating are ca 120 min for Zn-Fe, ca 60 min for acid zinc. Results of Kesternich test are also shown.

2-component coatings & transfer efficiency

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Answer to query regarding environmental inspection of 2-pack paint mixes, to check their VOC contents in terms of air emissions. What powers are and are not allowed to an inspector are noted. Query on paint transfer efficiency, whether 50% is a reasonable value, how to calculate it and what are factors which affect TE. Tests are not simple and can be time-consuming.

2-component paint plant for railway wagons

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Detailed description of computer-controlled mixing unit for 2-pack with process control & screen display details. Novel pump design allows pulse-free operation with no need for seals.

2-component paint plant for railway wagons

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Detailed description of computer-controlled mixing unit for 2-pack with process control & screen display details. Novel pump design allows pulse-free operation with no need for seals.

2-component water thinnable paints in building a multilayer coating

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2-hydroxyacetophenone-aroyl hydrazone derivatives as corrosion inhibitors for copper dissolution in nitric acid

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Title species is studied by galvanostatic polarisation & thermometric (Mylius) method. Mechanism, adsorption phenomena etc are reported. 20 refs. Paper avail. on web.

2-pack dosing system for high solids paints

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Report on new mixing & dosing unit for viscous corrosion protection paints with improved throughputs, used to apply high-solids low solvent paints by hot spraying method. Previously used application methods are described, requirements for new unit are specified & photo shows this. Mix ratios from 2: 1 to 5:1 are possible. Special arrangements are noted for zinc-loaded or micaceous iron flake loaded paints, with separate reservoirs. Safety devices prevent over-filling of stock tank and include safety pump shut-off. Process control is pneumatic. Some practical experiences using the new unit are reported.

2-pack paint finish for safes

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Ease of use of 2-pack was deciding factor, with high reliability of quality finish. Reduced problems of paint mist are noted.

2-pack painting perfected

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Case study of German ship-builder who switched to 2-pack with updated mixing facilities. Process control signals paint shortage and air pressure limits. Photos show paint hall, paint supply & mixing room. Table lists equipment.

2-pack PUR water-based paint on test

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Sets out historical development of title paint and shows chemical reactions involved. Detailed table compares aqueous & conventional versions. Effects of mixing are critical - table shows gloss values as function of mixing and viscosity-time plots are shown. Working times are linked to gloss values. Future developments are foreshadowed.

2-Pack water-based PUR in focus

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New formulations of 2-Pack PUR water-based paint have expanded application area (e.g for heavy duty agricultural machinery) and use simpler drying & curing methods. Applications for painting high-value plastic components such as window & door frames are also noted.

2-pack waterborne basecoat - a cost-effective OEM coating alternative

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In the battle to reduce total number of coating layers, title 2-pack basecoat also acts as primer surfacer and system has been tested by several car manufacturers. Chart shows equipment (or modification of same) required, and process sequence. Application methods & conditions are tabulated. 6 main coating systems are compared in terms of thicknesses & number of layers.

2-pack wet paint in a nutshell

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"Interview" with Herr Denig from Oteg GmbH, Germany, discusses commercial and technical aspects of 2-pack wet paints, costs, staff training etc.