Abstract: A method for producing smooth metal coatings on zincated aluminum substrates using a specially formulated zincating bath containing an additive comprising a bath soluble cationic condensation polymer represented by the general formula: ##STR1## wherein: Z represents a group of atoms necessary to complete a heterocylic compound having a five or six membered ring containing at least 2 nitrogen atoms;R is nothing or the alkyl group of an alkylating agent;X is Cl, Br or I, andn is >1.

Abstract: A method for producing extremely smooth metal coatings on zincated aluminum substrates using a special double zincating procedure and/or a specially formulated electroless metal plating bath employing a unique plating process.

Abstract: Bismuth impurity is removed from copper electrolyte by contacting the electrolyte with an effective amount of finely divided lead oxide.

Abstract: Fume generated by roasting speiss is contacted with an oxygen-containing gas at an elevated temperature for a sufficient time to product arsenic and antimony products which may be separated from each other by means such as condensation. Further, in the roasting of antimony-containing phases (such as speiss) the presence of arsenic can enhance the volatility of the antimony.

Abstract: A method for making printed circuit boards wherein the resistance of catalyzed nonconductive surfaces to solutions used in the processing stages, e.g., KOH used to remove an etch resist covering through-holes and the desired circuit lines, is enhanced by treating the catalyzed surface with an accelerator to activate the catalyst, treating the accelerated surface with a reducing agent, followed by baking.

Abstract: A process for electrodespositing a conductive material on a substrate is disclosed which comprises movably mounting the substrate in a first conductive liquid electroplating bath which contains the conductive material, maintaining substantially constant conditions of temperature and liquid circulation in the first bath, passing an electric current through the substrate and the first bath so as to deposit the conductive material on the substrate, periodically transferring the substrate to a second liquid bath, the second bath containing a liquid of the same composition or lower concentrations of dissolved ingredients as compared to the first bath, weighing the substrate when immersed in the second bath and calculating therefrom the weight in air of conductive material deposited, returning the substrate to the first bath, and continuing the plating in a series of stages of plating, weighing in liquid and plating until the desired deposit is built up.Apparatus for carrying on the method is also disclosed.

Abstract: Continuous casting of discrete solid shapes from a molten material using modified continuous casting machines and processes are disclosed. In a conventional twin belt continuous caster, for example, forming means such as dividers are employed on the upper belt to define a mold cavity in the casting region of the machine. Different size and shape forming means may be used to provide a variety of cast products.

Abstract: A vinyl-pyridine or vinyl-quinoline quaternary derivative is provided to enhance the brightness and operating properties of tin aqueous sulfuric acid plating baths.

Abstract: A method and apparatus is provided for applying liquid coatings such as solder masks sequentially to both sides of a printed circuit board substrate whereby only one drying operation would be needed to dry the liquid coatings. An isolation platen having openings corresponding to the coated parts of the board is used to provide a space between the coated part and the opposite side of the platen.

Abstract: A process is provided for the reduction roasting of ores using a C.sub.2 to C.sub.8 hydrocarbon. The process is particularly applicable to manganese dioxide containing ores and provides enhanced reduction of the manganese to lower oxidation states at low operating temperatures for manganese dioxide ores and provides increased silver recoveries from refractory manganese-silver ores.

Abstract: A method for waste treating metal containing solutions comprising decomposing the metal from the solution in the substantial absence of air and separating the decomposed (precipitated) metal from the solution.

Abstract: The method of making copper rod by rolling is significantly improved by effectively controlling the water-soluble oil emulsion used to lubricate the rolls by employing a conductivity probe to maintain the conductivity of the emulsion within desired operating limits.

Abstract: A mobile truck for moving containers and other articles comprising a base, supporting standards at opposite sides of the base, a handle pivotally attached at the upper ends of the standards, a lift supporting member pivotally attached to the handle and to a suitable lifter arm, the lifter arm having attached at one end a lifting device and the other end of the lifter arm being pivotally attached to a connecting bar, with the other end of the connecting bar being pivotally attached to the truck base.

Abstract: Arsenic and antimony are separated from speiss by a roasting operation employing pyrite and coke and the arsenic is separated from the resultant product by a water pressure leaching operation.

Abstract: The permanganate process for treating plastics, e.g., printed circuit boards, to enhance the adhesion of metal plating to the plastic is improved by employing electrolysis to either maintain a certain permanganate level in the operating bath or to regenerate a spent or used bath.

Abstract: A process is provided for improving the electroless nickel plating of aluminum which has been pretreated with a barrier coating such as zinc by employing multiple plating baths under controlled operating conditions.

Abstract: Fume generated by roasting speiss is contacted with an oxygen-containing gas at an elevated temperature for a sufficient time to produce arsenic and antimony products which may be separated from each other by means such as condensation. Further, in the roasting of antimony-containing phases (such as speiss) the presence of arsenic can enhance the volatility of the antimony.

Abstract: The invention relates to an improved electrodeposition process for the recovery of metals by controlling the concentration of certain impurities in the electrolyte. For a zinc sulfate electrolyte, control of only the antimony impurity level below a predetermined value provides an efficient electrodeposition process.

Abstract: A process for specially conditioning and etching a polycarbonate resin prior to metal plating to enhance the coverage and adhesiveness of metal plating to the resin. The swellant composition comprises a compound represented by the general formula,R.sub.1 (OC.sub.n H.sub.2n).sub.m O--R.sub.2wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of aryl groups and alkyl groups of 1-4 carbon atoms, n is 2 to 4 and m is 1 to 5.The swelled resin is then etched using, preferably, a highly alkaline composition such as a solution containing greater than about 100 g/l NaOH. Other etchants such as chromic acid may also be used.The resin is now ready for plating using conventional techniques.

Abstract: A process is provided for increasing the strength of antimony-lead alloys by specially treating an alloy which contains an effective amount of arsenic in the alloy, the process comprising working the alloy, rapidly heat treating the alloy, which includes quenching, for a period of time sufficient to activate a strengthening mechanism in the alloy. The process is especially useful for the manufacture of battery grids on a continuous production line.