Nondestructive Characterization of Corrosion Properties of Stainless Steel and Titanium Alloys

Mutlu, İlven; Songül, Eda Ergün; Oktay, Enver; Ekinci, Şinasi

doi:10.1134/s1061830921120111

Cited by 1 publication

(1 citation statement)

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“…Silva [7] observed that the change in sound velocity measured value is proportional to the change in material hardness measured value, and sound velocity can be used to characterize the embrittlement of duplex stainless steel. Mutlu [8] found that corrosion products would reduce ultrasonic velocity and increase ultrasonic attenuation, and Attenuation measurements are more sensitive than velocity measurements in characterizing corrosion products. Ultrasonic testing can be used for large-area nondestructive testing, but in harsh environments, such as high temperature, high radioactivity or narrow Spaces, conventional ultrasonic testing techniques are difficult to adapt [9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of corrosion resistance of 316L stainless steel by laser ultrasonic nondestructive testing technology

Lu,

Zhu,

Yin

et al. 2023

Mater. Res. Express

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At present, the corrosion resistance of materials such as 316L stainless steel is mainly tested by electrochemical testing, which is time-consuming, laborious and environmentally unfriendly. In this paper, the laser ultrasonic detection technology, which is a rapid, non-destructive, pollution-free microstructure and corrosion resistance evaluation method is used for the detection of 316L stainless steel, and the ultrasonic signals are filtered by the wavelet threshold denoising method. The results show that the laser ultrasonic attenuation coefficient obtained by the wavelet threshold denoising signal processing method has a good correlation with the corrosion resistance of 316L stainless steel. A laser ultrasonic potential evaluation model was established based on the passivation film rupture potential and ultrasonic attenuation coefficient. The average relative error of the evaluation model for corrosion resistance of 316L stainless steel is less than 5.00%. The relative error of corrosion resistance evaluated by the laser-receiving method is lower than that by the probe-receiving method. It is feasible to nondestructive evaluation of the corrosion resistance of 316L stainless steel by laser ultrasonic technology.

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Section: Introductionmentioning

confidence: 99%