Analysis of organic-coated steels by using small-angle neutron scattering

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• 作者：Chul H. Song ; Yong Choi ; Eun H. Shin…
• 关键词：small angle neutron scattering (SANS) ; modified AISI 1004 steel ; wet ; and ; dry corrosion test
• 刊名：The Physics of Metals and Metallography
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：115
• 期：13
• 页码：1333-1337
• 全文大小：1,301 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Metallic Materials
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1555-6190

文摘

Small angle neutron scattering (SANS) was applied to analyze the degradation of an organic coating layer on steel and for the non-destructive evaluation of the corrosion behavior of the coated steels. The steel was a modified AISI 1004 steel with 1.2% aluminum and 0.8% chromium to improve corrosion resistance. The organic coating layer was epoxy primer, which was painted with about 250-μm thickness on the steel. The organic-coated specimen was subjected to wet-and-dry cyclic corrosion conditions for 112 days in artificial sea water at 40°C. The corrosion potential and the corrosion rate of the steel were ?.1 VSHE and 8.8 × 10? A/cm2, respectively. SANS spectra showed that nano-sized defects were not formed in the organic layers after the 112-day wet-and-dry corrosion test. Artificial cracks of the organic layer by X-cutting made corrosion spots of submicron size after a 2-day wet-and-dry corrosion test, which were monitored by SANS.