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P & H Plating - How Could that Happen ?

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Post-mortem on the notorious case where plating shop operator was sentenced to prison for discharging cyanide to a river. Very detailed survey of his firm & its operations and effluent treatment procedures with comments. Firm had invested very substantially in effluent treatment plant.

p-Toluenesulphonic Acid for Electrocolouring of Anodised Aluminium

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P-type transparent conducting SnO2:Zn film derived from thermal diffusion of Zn/SnO2/Zn multilayer thin films.

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SURF Highly transparent, p-type conducting SnO2:Zn thin films are prepared from the thermal diffusion of a sandwich structure of Zn/SnO2/Zn multilayer thin films deposited on quartz glass substrate by direct current (DC) and radio frequency (RF) magnetron sputtering using Zn and SnO2 targets. The deposited films were annealed at various temperatures for thermal diffusion. The effect of annealing temperature and time on the structural, electrical and optical performances of SnO2:Zn films was studied. XRD results show that all p-type conducting films possessed polycrystalline SnO2 with tetragonal rutile structure. Hall effect results indicate that the treatment at 400 °C for 6 h was the optimum annealing parameters for p-type SnO2:Zn films which have relatively high hole concentration and low resistivity of 2.389 1017 cm- 3 and 7.436 O cm, respectively. The average transmission of the p-type SnO2:Zn films was above 80% in the visible light range.

P.c.b Manufacturer's Effluent Treatment System Results in Semi-Closed Loop

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Case study with photos & flowsheet diagrams of p.c.b effluent treatment based on ion-exchange and electrolytic copper recovery. Neutralisation & batchwise treatment of Pb-Sn are also described.

P.t.f.e Composite Substrate for Printed Circuit Boards

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Description of new RO2800 p.c.b substrate material which has p.t.f.e matrix with glass fibre reinforcement and ceramic powder loading. Its properties are listed and compared with epoxy/glass while details are given of its etching, fabrication into multilayer boards and testing.

P.t.f.e for Corrosion Protection

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Short note shows useful temp. range of p.t.f.e in comparison with 4 other fluorine-cont'g polymers. The permeability of p.t.f.e is plotted vs. temp.

P3E technology - new coatings for cutting & machining tools

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New technique combines advantages of PVD & CVD in a single step, forming very hard coatings at < 600°C. Table compares PVD, CVD & P3E, typically forming an alpha alumina corundum coating, shows equipment & metallographic cross-section of a coating. www.oerlicon.com/coatingservices.de

p3TP - updated formula for quality powder

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Choice of powder, selection of Zn or Fe phosphate system, chrome-free and chrome-containing sealers are discussed.

Pacific Rim News - Business Methods in the Far East

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Essay on business customs, manners, gifts etc when in Far Eastern countries.

Pack aluminisation kinetics of nickel rods and foams.

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MST

Pack Aluminisation of Low Alloy Steels at Temperatures Below 700 ° C.

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Pack Aluminizing of Cast Iron

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Powder based on 25 to 35% Al, 50-60 alumina, 1-2 ammonium chloride; 5-20 Fe powder.

Pack carburisation of commercially pure titanium with limited oxygen diffusion for improved tribological properties.

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Pack Cementation Coating System

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A form of CVD is described in which the reactant is packed around the substrate and then heated. A range of coatings for hardness, high temp. oxid'n resistance, corr'n prot'n or lubricity is shown. The app'tus and processing sequences are described. 6 refs.

Pack Cementation of Inconel Super Alloys

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Use of Al for pack cementation of gas turbine components is reported, together with chromium, nickel, zirconium powder mixtures. (Extended Abstract only).