Journal of Dalian Maritime University >
2016 , Vol. 42 >Issue 2: 124 - 128
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2016.02.020
Effect of chlorine ion in soil on corrosion behavior of solvent-free coal asphalt coating
Received date: 2015-10-30
Revised date: 2016-01-11
Online published: 2016-01-11
To analyze the corrosion behavior of solvent-free coal asphalt coating in different chloride ion concentration, the corrosion potential and the low frequency impedance modulus of the coating were tested by electrochemical technique. Results show that with the increase of chloride ion content in soil, coating corrosion potential negative shift, capacitive reactance arc radius and the impedance modulus value reduce, which indicates that the increase of chloride ion content in soil will lead to a decrease in the shield ability of the coating to the corrosive medium in soil.The EIS of coating with 400 μm immerses in soil of 29% H2O+1.8% NaCl appears only one capacitive reactance arc. With the extension of time buried, the impedance value decreases, and the resistance is 8.3020×108 Ω•cm2 for 360 days.There is no signs of bubbling, cracking and spalling,which shows that the coating forms the effective shielding layer with a good protective effect on matrix metal.
Key words： soil; chlorine ion; solvent-free epoxy asphalt coating; corrosion behavior
LI Rui-chao , LIANG Cheng-hao , HUANG Nai-bao , et al . Effect of chlorine ion in soil on corrosion behavior of solvent-free coal asphalt coating[J]. Journal of Dalian Maritime University, 2016 , 42(2) : 124 -128 . DOI: 10.16411/j.cnki.issn1006-7736.2016.02.020
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