The work aims to investigate the galvanic corrosion problem faced by the combined application of carbon fiber reinforced composites with metal materials in the shipbuilding industry.A kind of typical carbon fiber reinforced vinyl resin composite was chosen as the research object and the natural exposure test was carried out in the marine at-mospheric environment of Qingdao for 0.5 a,1 a,1.5 a and 2 a.Then,the galvanic corrosion effect of the carbon fiber re-inforced composite and low alloy steel was studied by electrochemical analysis methods.Furthermore,the effect of aging behavior of the carbon fiber reinforced composite on their galvanic corrosion to steel was investigated based on aging mechanism analysis.The open circuit potentials of the composite samples exposed for different periods in the atmospheric environment of Qingdao were significantly different from that of low alloy steel,indicating a high tendency for galvanic corrosion.With the prolongation of exposure time,micro-cracks on the surface of the composite samples continued to generate and expand,leading to an increase in the active points of electrochemical reactions.As a result,the galvanic current increased accordingly.After exposure for 2 a in the marine atmospheric environment of Qingdao,the galvanic current between the carbon fiber reinforced composites and low alloy steel is 0.356 9 μA/cm2,reaching Class B for the galvanic corrosion sensitivity.
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