INVESTIGATION OF CORROSION-RESISTANCE OF CHEMICAL CONVERSION FILM AND PHOSPHATING PRIMER ON 2024 ALUMINIUM ALLOY

J Chin Soc Corr Pro

2003, Vol. 23

Issue (3): 156-159 DOI:

Research Report

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INVESTIGATION OF CORROSION-RESISTANCE OF CHEMICAL CONVERSION FILM AND PHOSPHATING PRIMER ON 2024 ALUMINIUM ALLOY

Xiaoqing Long;Rongkuan Shao

中国民用航空学院理学院

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Abstract Phosphating primer and anoding chemical conversion film were measured using 3 measurement of salt spray corrosion tests,potentiosta tic anodic polarization curves and electrochemical impedance spectroscopy(EIS).I t were discovered from the result that corrosion-resistance of phosphating pri mer was still better by comparison with anoding chemical conversion film.Anoding chemical conversion film was markedly corroded but phosphating primer was as th e same as original state in 10 cycles of neutral salt spray corrosion tests.Corr osion-resistance of both was similar within the part of stable state and weak po caviztion,but corrosion-resistance of phosphating primer was obviously better th an anoding chemical conversion film within the part of strong polarization.Polar ization resistance (Rp) of phosphating primer was a order of magnitude hig her ghan anoding chemical conversion film on EIS.

Key words: anoding phosphating primer salt spray corrosion test EIS anodic polarization

Received: 21 October 2001

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TG172

Corresponding Authors: Xiaoqing Long

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Xiaoqing Long; Rongkuan Shao. INVESTIGATION OF CORROSION-RESISTANCE OF CHEMICAL CONVERSION FILM AND PHOSPHATING PRIMER ON 2024 ALUMINIUM ALLOY. J Chin Soc Corr Pro, 2003, 23(3): 156-159 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2003/V23/I3/156

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