Effect of Ultrasonic Impact Treatment on Corrosion Resistance of Welded Joints of 16MnR Steel

Bo Lin He; Ying Xia  Yu; Jing Liu; Jian Ping Shi

doi:10.4028/www.scientific.net/AMR.815.689

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 815Effect of Ultrasonic Impact Treatment on Corrosion...

Effect of Ultrasonic Impact Treatment on Corrosion Resistance of Welded Joints of 16MnR Steel

Abstract:

The weld seam and weld toe surface were treated by ultrasonic impact method. The contrast corrosion tests were performed in 3.5% NaCl aqueous solution both for the un-treated and treated joint. The experimental results indicate that the severe plastic deformation on the surface of weld seam and weld toe were formed by ultrasonic impact for different time, the maximum depth of the plastic deformation layer is about 300μm. Residual tensile stress in the surface of weld seam and weld toe can be changed to residual compressive stress by impact treatment, and the grain in the surface of welded joint could be refined. Compared to the un-treated joint, when the impact current is 1.2A and 1.5A, respectively, the corrosion rate of treated joint was reduced by 22.67%, 54.59%, 43.99% and 33.92%, 56.54%, 49.29%, respectively for 10, 20 and 30 min. treating. The corrosion resistance of welded joint has a certain relationship with the residual stress on the surface of welded joint. The ultrasonic impact treatment has distinct effect on the corrosion resistance of 16MnR welded joint.

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Progress in Materials Science and Engineering: ICMSE 2013

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Periodical:

Advanced Materials Research (Volume 815)

Pages:

689-694

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.815.689

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Online since:

October 2013

Authors:

Bo Lin He, Ying Xia Yu, Jing Liu, Jian Ping Shi

Keywords:

16MnR, Corrosion Resistance, Ultrasonic Impact, Welded Joint

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