LEAD AND LEAD ALLOYS, WITH ENHANCED CREEP AND/OR INTERGRANULAR CORROSION RESISTANCE, ESPECIALLY FOR LEAD-ACID BATTERIES AND ELECTRODES THEREFOR

    公开(公告)号:CA2384700A1

    公开(公告)日:2001-04-12

    申请号:CA2384700

    申请日:2000-06-28

    Inventor: PALUMBO GINO

    Abstract: Recrystallized lead and lead alloy positive electrodes for lead acid batteri es having an increased percentage of special grain boundaries in the microstructure, preferably to at least 50 %, which have been provided by a process comprising steps of working or straining the lead or lead alloy, and subsequently annealing the lead or lead alloy. Either a single cycle of working and annealing can be provided, or a plurality of such cycles can be provided. The amount of cold work or strain, the recrystallization time and temperature, and the number of repetitions of such steps are selected to ensure that a substantial increase in the population of special grain boundaries is provided in the microstructure, to improve resistance to creep , intergranular corrosion and intergranular cracking of the electrodes during battery service, and result in extended battery life and the opportunity to reduce the size and weight of the battery.

    METALLIC STRUCTURES WITH VARIABLE PROPERTIES

    公开(公告)号:CA2708186C

    公开(公告)日:2013-01-08

    申请号:CA2708186

    申请日:2008-09-25

    Abstract: Variable property deposit, at least partially of fine-grained metallic material, optionally containing solid particulates dispersed therein, is disclosed. The electrodeposition conditions in a single plating cell are suitably adjusted to once or repeatedly vary at least one property in the deposit direction. In one embodiment denoted multidimension grading, property variation along the length and/or width of the deposit is also provided. Variable property metallic material deposits containing at least in part a fine-grained microstructure and vari-able property in the deposit direction and optionally multidimensionally, provide superior overall mechanical properties compared to monolithic fine-grained (average grain size: >20 micron) or entirely amorphous metallic material deposits.

    MATERIALES METALICOS ELECTRODEPOSITADOS QUE COMPRENDEN COBALTO.

    公开(公告)号:MX2011012583A

    公开(公告)日:2011-12-14

    申请号:MX2011012583

    申请日:2010-05-31

    Abstract: La presente invención se refiere a artículos o artículos autónomos recubiertos al menos parcialmente con materiales metálicos que llevan Co amorfos y/o de granos finos, substancialmente libres de porosidad, que contienen opcionalmente materiales particulados sólidos dispersados en los mismos. Las capas y/o parches metálicos electrodepositados que comprenden Co proporcionan, mejoran o restablecen la resistencia, el uso y/o la lubricidad de los substratos sin reducir el funcionamiento en condiciones de fatiga comparado con el substrato recubierto con Cr no recubierto o de espesor equivalente. Los recubrimientos metálicos amorfos y/o de granos finos que comprenden Co son particularmente adecuados para los artículos expuestos a ciclización térmica, fatiga y otras tensiones y/o en aplicaciones que requieren propiedades antimicrobianas e hidrofóbicas.

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