ROLE OF BORON IN INHIBITING DEZINCIFICATION OF ALUMINIUM BRASS

J Chin Soc Corr Pro

1996, Vol. 16

Issue (2): 87-93 DOI:

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ROLE OF BORON IN INHIBITING DEZINCIFICATION OF ALUMINIUM BRASS

Wang Jihui;Jiang Xiaokia;Li Shizhou(Institute of Metal Research; Chinese Academy of Sciences)

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Abstract The role of boron in inhibiting dezincification of aluminium brass was investigated by ICP, XRD,EMPA and PAT methods. By adding trace boron into aluminium brass with or without arsenic, the resistance of the brass against this type of selective corrosion could be remarkably improved. Due to the synergetic effect of boron and arsenic, dezincification was hindered. The optimum content of boron in the alloy was about 0.01% in the absence of arsenic, and 0.005~0.008% in the presence of arsenic.For aluminium brass without boron and arsenic, dezincification was attributed to the diction of grain boundary because of its large grain size. For aluminium brass with boron but without arsenic, boron could move into the grain boundary and divacancy, wich were considered to be the route of dezincification, and then reduced the dezincification rate. In the presence of boron and arsenic in brass, boron and arsenic atoms moved into the divacancy, blocked the way of dezincification, so that dezincification could not take place.

Key words: Boron Brass Dezincification

Received: 25 April 1996

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Wang Jihui;Jiang Xiaokia;Li Shizhou(Institute of Metal Research; Chinese Academy of Sciences). ROLE OF BORON IN INHIBITING DEZINCIFICATION OF ALUMINIUM BRASS. J Chin Soc Corr Pro, 1996, 16(2): 87-93.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1996/V16/I2/87

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