Abstract: A zinc electroplating bath includes zinc ions and a brightening agent. The brightening agent is a polyamine or a mixture of polyamines that include a quaternary ammonium group.

Abstract: A zinc electroplating bath includes zinc ions and a brightening agent. The brightening agent is a polyamine or a mixture of polyamines that include a quaternary ammonium group.

Abstract: An electrode is steeped in a solution of Mg and B and a negative voltage is applied to the electrode so as to precipitate superconductive MgB2 on the electrode. Superconductive MgB2 is easily manufactured in various forms and at low costs without any special device.

Abstract: An additive for an alkaline zinc or zinc alloy electroplating bath medium, the additive comprising a random co-polymer comprising the reaction product of: (i) one or more di-tertiary amines including an amide or thioamide functional group, and (ii) optionally, one or more saturated second di-tertiary amines and/or one or more second di-tertiary amines including an unsaturated moiety, with (iii) one or more saturated or unsaturated linking agents capable of reacting with said di-tertiary amines (i) and (ii), provided that, where all the linking agents are saturated, an unsaturated di-tertiary amine must he present. Preferably, the polymer has the general formula n(2x+2y+zEp)j-.

Abstract: An aqueous alkaline non-cyanide zinc electroplating bath containing zinc ions for producing bright electrodeposits of zinc and a brightening agent comprising a polymeric quaternary amine and a reducing sugar, and a compound that forms a reducing sugar upon hydrolysis.

Abstract: A polymer additive for alkaline zinc and zinc alloy electrodepositing media and processes comprises the reaction product of one or both of (i) a first di-tertiary amine of the formula:  where R′ represents  and q is 2 to 6, R represents CH3 or C2H5 and each R may be the same or different and m is 2 to 4, and a second di-tertiary amine of the formula:  where B is CgH2g+1 and g=0 or an integer the respective B groups being the same or different, and f=0 o an integer, and R″ represents CH3 or C2H5 and each R″ may be the same or different, with (ii) a di-halo alkane of the formula: A—(CH2)n—A where A represents a halogen atom and n is at least 2. The resulting polymer preferably has the general structure: Where: 0≦x≦1 0≦y≦1 and: either (x or y) or (x and y)=1 z is at least 2 and when y=0, n is at least 3.

Abstract: The present invention provides a method of forming a zinc oxide film on a conductive substrate, which comprises dipping the conductive substrate and a counter electrode in an aqueous solution containing at least nitric acid ion and zinc ion and supplying a current between these electrodes to form a zinc oxide film, wherein the aqueous solution further contains polycarboxylic acid in which a carboxyl radical is bonded to each of carbon having sp2 hybrid orbital, or its ester with a concentration of 0.5 &mgr;mol/L to 500 &mgr;mol/L. Thereby, it is possible to form in a short time a thin film having texture structure exhibiting an optical confinement effect, to prevent abnormal growth of a deposited film, and to obtain a zinc oxide thin film having excellent uniformity and adhesion on a surface thereof where the film is formed. Also, by applying the photovoltaic device to a stacked structure, it is possible to enhance the photoelectric characteristics and mass producibility.

Abstract: An electroplating bath is disclosed that is particularly suited to the electrodeposition of tin, zinc and alloys of the foregoing in a smooth and bright electrodeposit. The disclosed electroplating bath comprises propanedioic acid, diethyl ester, polymer with N-(3-aminopropyl)-1,3-propanediamine, N-(2-carboxy benzoyl) as a brightener additive.

Abstract: Provided are a substrate with a zinc oxide layer, in which at least a zinc oxide layer is provided on a support substrate, wherein the zinc oxide layer comprises a zinc oxide layer having the c axis perpendicular to the support substrate and a zinc oxide layer having the c axis slantindicular to the support substrate in the order from the side of the support substrate; and a photovoltaic device in which a semiconductor layer is formed on the substrate with the zinc oxide layer. Thus provided is the inexpensive photovoltaic device with excellent reflective performance and optical confinement effect and with high photoelectric conversion efficiency.

Abstract: An aqueous acid plating bath for the electro-deposition of a zinc or zinc alloy deposit on a substrate which includes zinc ions and an additive of the general formula ##STR1## wherein R.sub.1 and R.sub.2 are selected from the following functional groups hydroxyl, carbonyl, carboxylic acid or its salt; R.sub.3 is selected from the following groups hydrogen, hydroxyl, carbonyl, carboxylic acid or its salts; R.sub.4 and R.sub.5 are electron withdrawing groups, such as but not totally inclusive, halides, sulfonic acid or its salts, triflouromethyl, cyano, and amino groups.

Abstract: Salts of aromatic hydroxy compounds are used as brighteners in acidic electroplating baths. Furthermore, acidic electroplating baths for the electrolytic deposition of metallic layers onto shaped articles comprise, as brighteners, at least one novel salt of an aromatic hydroxy compound. Finally, shaped articles are electroplated by a process using the novel acidic electroplating baths.

Abstract: The inventors disclose a process for producing semi-bright to bright electrogalvanic coatings at high current densities, comprising electroplating a cathodic conductive substrate in a coating bath based on:a) a zinc sulfur-acid salt;b) a low molecular weight polyoxyalkylene glycol based on 2 to about 4 carbon atom alkylene oxides;c) an aromatic sulfonate; andd) a conductivity enhancing salt.The process includes maintaining the coating composition at a pH from about 2 to about 5 and the current density on the substrate at from about 1,000 to about 3,700 ASF. The zinc sulfur-acid salt includes zinc sulfate or a zinc organosulfonate, and the conductivity enhancing salt, a potassium salt. In one embodiment, the aromatic sulfonate comprises a condensation product of an aromatic sulfonate and formaldehyde. The inventors also describes coating bath compositions.

Abstract: A high current density electrogalvanizing process and composition are disclosed for reducing high current density dendrite formation and edge burn and controlling high current density roughness, grain size and orientation of a zinc coating obtained from a zinc sulfate aqueous acidic electrogalvanic coating bath. The composition comprises a high molecular weight polyoxyalkylene glycol grain refining agent in combination with a sulfonated condensation product of naphthalene and formaldehyde which is used as an antidendritic agent.

Abstract: The production of shining shaped articles coated with zinc or a zinc alloy by electrodeposition of zinc or a zinc alloy from acidic aqueous electrolytic baths which contain as essential components one or more zinc salts and, where appropriate, salts of the other alloy metals, one or more conducting salts, one or more surfactants and one or more brighteners, entails employing as brighteners compounds of the formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.8 -alkoxy, phenoxy, benzyloxy, amino, C.sub.1 -C.sub.6 -alkylamino or di(C.sub.1 -C.sub.6)alkylamino,R.sup.2 is C.sub.1 -C.sub.4 -alkyl, phenyl, benzyl or the meanings of R.sup.1, andAr is phenyl or naphthyl which can additionally be substituted by one to three C.sub.1 -C.sub.4 -alkyl groups or C.sub.1 -C.sub.4 -alkoxy groups.