The Kelvin probe study on initial corrosion of weathering steel with NaCl deposition

  • Chaofang Dong*
  • , Qian Liu
  • , Kui Xiao
  • , Longjiao Xu
  • , Xiaogang Li
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Scanning Kelvin Probe (SKP) combined with Scanning Electron Microscope (SEM) and Energy-Dispersive Spectrometer (EDS) analysis were used to study the corrosion behavior and electrochemical law of weathering steel Q450NQR1 deposited with NaCl particles at initial period of heat-damp test. The results showed that Q450NQR1 was severely attacked by Cl- for the reason that a low electric potential anode area was formed after a NaCl particle deliquesced rapidly. This anode area was corroded quickly, resulted in the appearance of rust spot, which led to a conductivity decline of the steel substrate and an increase of potential in the rust region. Moreover, tiny crack formed on the rust scale during the early stage and the galvanic couple between rust spot area possessing a high electric potential and metal substrate with a low electric potential were the two main reasons for the expansion of rust layer and the enhancement of corrosion.

Original languageEnglish
Title of host publicationNew Materials and Advanced Materials
Pages493-499
Number of pages7
DOIs
StatePublished - 2011
Externally publishedYes
Event2010 International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2010 - Shenzhen, China
Duration: 6 Nov 20108 Nov 2010

Publication series

NameAdvanced Materials Research
Volume152-153
ISSN (Print)1022-6680

Conference

Conference2010 International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2010
Country/TerritoryChina
CityShenzhen
Period6/11/108/11/10

Keywords

  • Atmosphere Corrosion
  • NaCl
  • Scanning Kelvin Probe
  • Weathering Steel

Fingerprint

Dive into the research topics of 'The Kelvin probe study on initial corrosion of weathering steel with NaCl deposition'. Together they form a unique fingerprint.

Cite this