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Quality assurance in thermal spraying

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Digital camera is used to determine, monitor and/or control feature(s) which influence process quality.

Quality assurance of Arc-PVD-titanium nitride coated tools. Pt 1. Establishing customer requirements & specifying quality

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Parameters for setting up a customer-oriented quality assurance scheme and diagrams used to present the data.

Quality assurance of furniture - practical experiences

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Report on Mustering International, the oldest German brand of furniture and some QA tests carried out, esp. VOC emissions from finished furniture. Tables show indoor concentrations of formaldehyde, acetone, ethanol, ketones etc.

Quality assurance of painting technology undergoes change

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Quality assurance of painting technology undergoes change

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Quality assurance of painting technology undergoes change

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Quality assurance of powder coating colours

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A new set of Guidelines has been issued for architectural powder coated surfaces, VdL-RL 10. Arguments for colour shade control and ensuring valid measurements are discussed. Permitted tolerances are noted with table & triangular graph showing these. 10 refs

Quality assurance of PVD and CVD hard coatings

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Note on German VDI Guideline for coated tools or materials. Section 1 "Property profiles & application areas" (VDI 3824). Section 4. (Test programmes for hard coats). Other Sections to be issued 2. "Requirements for tools to be coated", 3. "Processing sequences & Routines". Website: www.vdi.de

Quality assurance statistics in metal finishing

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Exposition of simple statitistical approach, variance of parameters, scatter width etc. Graphs illustrate these concepts and time charts of specified parameters allow variability to be monitored. Sometimes control of a simple parameter such as pH or conductivity can decrease variability.

Quality assurance through ultrasonics

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Ultrasonic cleaning used in Cu-Ni-Cr electroplating plant for manometers at Alexander Wiegand GmbH. & Co., Klingenberg, is described.

Quality Assurance Today - Report on a Conference

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Report on meeting at Borkum describing precepts for QA and its certification. The new logo "Process Control by an Independant Body" of German Electroplaters, is shown. Certification &training are discussed.

Quality Assurance Using Expert Systems - Electroless Nickel as an Example

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Concept of Expert System is described & demonstrated with reference to electroless nickel. Numerous charts & diagrams explain the basis of the concept. Plot shows increase of phosphite concentration vs. turnover number - a parameter used by the diagnostics of the system. Typical troubleshooting computer screen is shown - defect is corner weakness. Computer checks temperature, [Ni], complexant, bath age, pH, hypophosphite, stabiliser & bath agitation. Most of these are in specification & diagnosis is too strong agitation. 15 refs.

Quality Assurance with Just-in-Time Production

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Discussion suggests QA must be present at each stage. Documentation required is outlined and long-term and short-term QA goals are outlined. 1 ref

Quality assurance with optimised environmental processing for anodised aluminium

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Comments on design & construction suitable for subsequent anodising. Classification of metal pretreatment, 9 E-X code numbers designate pretreatment used or specified. Disc'n of degreasing, pickling, activation (brightening), anodising. Classification of anodised coating thicknesses is set out, comments on visual appearance & inspection, dyeing & colouring, sealing, rinsing and subsequent metal deformation & heat treatment. Test methods for thickness, sealing, weight loss. Transport, storage etc and environmental issues such as life extension of pickling/etching baths & anodising electrolyte. No refs

Quality Assurance with RAL RG 660

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Discussion on compliance which calls for in-house plant supervision based on quality management system and also external auditing. The relationship of this to ISO 9000 specification is described.