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

LIN Qidie

doi:10.16577/j.issn.1001-1560.2023.0191

Materials Protection >

2023 , Vol. 56 >Issue 8: 91 - 96

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0191

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

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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.

Key words： AE44/MS structure; electrochemistry corrosion; relative humidity; marine climate; numerical simulation

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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