Enhanced Corrosion Resistance of SA106B Low-Carbon Steel Fabricated by Rotationally Accelerated Shot Peening

The corrosion resistance of a SA106B carbon steel with a gradient nanostructure fabricated by rotationally accelerated shot peening (RASP) for 5, 10, 15 and 20 min was investigated. Electrochemical tests were carried out in the 0.05 M H2SO4 + 0.05 M Na2SO4 and 0.2 M NaCl + 0.05 M Na2SO4 solutions. T...

Full description

Saved in:
Bibliographic Details
Published in:Metals (Basel ) 2019-08, Vol.9 (8), p.872
Main Authors: Lei, Chaonan, Chen, Xudong, Li, Yusheng, Chen, Yuefeng, Yang, Bin
Format: Article
Language:English
Subjects:
carbon steel
Cementite
Corrosion potential
Corrosion resistance
Corrosion resistant steels
Electrodes
Grain boundaries
Grain size
Low carbon steel
Low carbon steels
Microcracks
nanocrystalline
Nuclear power plants
rotationally accelerated shot peening
Shot peening
Stainless steel
Sulfuric acid
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The corrosion resistance of a SA106B carbon steel with a gradient nanostructure fabricated by rotationally accelerated shot peening (RASP) for 5, 10, 15 and 20 min was investigated. Electrochemical tests were carried out in the 0.05 M H2SO4 + 0.05 M Na2SO4 and 0.2 M NaCl + 0.05 M Na2SO4 solutions. The experimental results showed that the sample RASP-processed for 5 min exhibited the best corrosion resistance among them. TEM analysis confirmed that the cementite dissolution and formation of nanograins, which improved the corrosion resistance of the steel. Prominent micro-cracks and holes were produced in the samples when the RASP was processed for more than 5 min, resulting in the decrease of corrosion resistance.
ISSN:2075-4701
2075-4701
DOI:10.3390/met9080872