ELECTROCHEMICAL INVESTIGATION OF INHIBITION OF 2-MERCAPTOBENZOXAZOLE(MBO) FOR COPPER CORROSION

J Chin Soc Corr Pro

1999, Vol. 19

Issue (6): 363-366 DOI:

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ELECTROCHEMICAL INVESTIGATION OF INHIBITION OF 2-MERCAPTOBENZOXAZOLE(MBO) FOR COPPER CORROSION

Chuanwei Yan;;;

中科院金属腐蚀与防护研究所

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Abstract The inhibition of 2-Mercaptobenzoxazole (MBO) against copper corrosion in 3% NaCl solution was investigated by means of potentiodynamic polarization measurements.MBO hindered both the anodic and cathosic reactions,especially reduced enormously anodic corrosion current in relative broad potential range.Its inhibition efficiency was dependent on MBO concentration,the corrosivity of the medium in which the inhibitive film formed and the duration when copper samples were immersed in the medium containing MBO.The inhibitive film formed in the MBO solution containing sodium chloride possessed much higher inhibitive film formed in the MBO solution containing sodium chloride possessed much higher inhibition capacity than that formed in plain MBO solution.An inhibition efficiency of about 99% could be obtained by immersing Cu sample in 3% NaCl + 1mmol/L MBO for above 20h. With the formation of the inhibitive film on copper surface,mass gain could be measured by quartz crystal microbalance (QCM).It is concluded that the inhibition of MBO is related to the corrosion of copper.

Key words: 2-mercaptobenzoxazole(MBO) inhibition copper corrosion electrochemistry

Received: 18 December 1998

Corresponding Authors: Chuanwei Yan

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Chuanwei Yan. ELECTROCHEMICAL INVESTIGATION OF INHIBITION OF 2-MERCAPTOBENZOXAZOLE(MBO) FOR COPPER CORROSION. J Chin Soc Corr Pro, 1999, 19(6): 363-366 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I6/363

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