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Preliminary Corrosion Behavior of AE44/MS Bolt Structure in Marine Atmosphere with Different Humidity

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  • School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China

Received date: 2023-02-22

  Revised date: 2023-03-12

  Accepted date: 2023-04-15

  Online published: 2023-08-25

Abstract

The mixed use of different materials in marine climate environment will form galvanic pair to accelerate structural corrosion.Numerical simulation was conducted on the corrosion characteristics of AE44/MS magnesium alloy plate steel bolted connection structures in a 1.6%NaCl marine atmospheric environment.The relative humidityRHin the atmospheric environment was taken as an independent variable,and the relative humidity was 70%,75%,80%,85%,90%,and 95%,respectively.Results showed that the current density of magnesium alloy plate side in the contact area of AE44/MS structure material changed the most,indicating that the formed galvanic pair accelerated the corrosion of magnesium alloy plate in atmospheric environment.With the increase of relative humidity,the maximum current density of AE44/MS bolted connection structure increased first and then decreased.When relative humidityRHwas 90%,the maximum corrosion current density could reach 16.7 A/m2,and the fastest corrosion rate was up to 40 mm/a.

Cite this article

LIN Qidie . Preliminary Corrosion Behavior of AE44/MS Bolt Structure in Marine Atmosphere with Different Humidity[J]. Materials Protection, 2023 , 56(8) : 91 -96 . DOI: 10.16577/j.issn.1001-1560.2023.0191

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