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Q & A on plasma quality cleaning
Basic physical principles & chemical equations are set out. Discussion of plasma systems and answers to specific questions such as where and for what applications is plasma suitable. Histogram shows results of cleanliness tests (using ESCA) for various plasma types. Etch rates (metal removal) are listed in terms of substrate metal. Graphs & table show carbon content of steel in cracks. Sketches show parallel plate & down-stream reactor. 14 refs
Q & A - Effluent Treatment from Small Scale Electroless Nickel Process
Synopsis, with 3 refs, of alternative approaches to effluent treatment technologies for smaller scale EN units.
Q & A on Metal Products & Machinery Regulations
Q & A on USA laws discusses who is affected, effluent & waste treatments, analysis of cyanide incl. EPA colorimetric method, cyanide treatment methods & how chlorination performs, regulations concerning suspended solids even though these are non-toxic,, oil & grease removal.
Q & As for WDD-2 conductivity water controller.
Answers are presented to some questions about the WDD-2 conductivity water controller, such as whether it is workable for automatic control of the rinsing water containing hexavalent chromium or needing to meet a very high requirement, whether it is applicable to multi-stage dynamic countercurrent rinsing, multi-stage claiming or sprinkling plus dip rinsing, and why it is not provided with a digital display.
Q-switched lasers place stone carvings at risk
Use of title method for laser cleaning of antiquities, incl. sculptures, remains controversial. Dangers of bleaching and structural modification of stonework are discussed, with comments on laser-cleaning of paintings and spectroscopic analyses of the results. Bronze sculptures respond well.
Q235 steel/Al-Ni plating/study on characteristics of micro-arc oxide coating.
A dense oxide ceramic coating was prepared on the aluminium nickel alloy plated on steel surface by micro-arc oxidation (MAO) in Na2SiO3 electrolytic solution. The surface morphology of Al-Ni ceramic coating were analyzed by SEM and the electrochemical features of the corrosion of ceramic coating were studied by potentiodynamic scanning (PDS). Also the effects of treating solution concentration on growth rate, microhardness and corrosion of ceramic coating were tested. The experimental results show that the treating solution concentration affects coating growth rate, microhardness and corrosion.
QCM studies of chemical solution deposition of ZnO in aqueous media containing zinc nitrate and dimethylamineborane.
QIB Series Part 1.
QIB is Qualitaetsgemeinschaft Industriebeschichtung e.V, www.iqib-online.de a qualit assurance body, mainly for organic & powder coatings. Defect case history is noted, for powdercoated letterboxes which are shipped in s ealed packaging. Condensation can occur and water discoloration of the coating. Remedy is gentle heating with a hairdryer, or passage through stoving oven but not above 90°C..
QSPR study passivation by phenolic compounds at platinum and boron-doped diamond electrodes.
Qualanod: A Quality Labelling Scheme for Anodised Aluminium
Title scheme, its application & relationship to BSS, ISO & DIN standards is described. Disc'n p. 80.
Qualicoat - raising the standard
Note about this mainly European organisation which validates the quality of powder coatings and the organisations that apply them.
Qualicoat specifications grow
Qualicoat is a quality mark for various surface coatings such as powder coating, esp. for architectural uses. Its relationship to Standards such as BS EN 12206-1.2004 is discussed with information on the organisation itself. Qualicoat UK is based in Birmingham
Qualification of high-performance pigments for motor vehicle original-equipment-manufacturer coatings
Functions of pigments in motor vehicle coatings and optical properties are discussed, together with colour measurement, surface chemistry, morphology and pigment dispersion, and durability aspects. Effect pigments are examined in terms of metallic effect, circulation stability, use for aq. coatings, dispersion, use of mica, and coloured Al testing.
Qualification of Palladium-Nickel Deposits on European Connectors
Qualimetry of coatings - a multi-purpose concept.
A quantitative approach to the evaluation of the quality of a coating as a measure of its serviceability is discussed. By combining experimental data and expert experience, each coating material can be characterised by a complex "function of quality". This is composed of the "valuable properties" of the material which are defined as those essential to decide on the suitability of the paint for the intended application.