PSI - Issue 16

Vitalii Knysh et al. / Procedia Structural Integrity 16 (2019) 73–80 Vitalii Knysh et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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was somewhat higher than on the surface, strengthened by HFMI, and after 2400 hours it was approximately 0.184 mm/y (millimetres per year) and 0.162 mm/y, respectively. The results of metallographic and corrosion tests at high humidity affirmed that application of HFMI technology helps increase of corrosion resistance of the welding joint with a strengthened layer, despite it has a local damage.

0

240 h

720 h

1200 h

2400 h

grounded surface

0

240 h

720 h

1200 h

2400 h

HFMI treated and grounded surface

Fig. 4. Surface of 15KhSND steel base metal after corrosion tests at high humidity and removal of corrosion products.

і cor , mm/year

0,15 0,20 0,25 0,30 0,35 0,40 0,45

2

1

0

500 1000 1500 2000

 , hours

 , години

Fig. 5. Corrosion rate during testing at high humidity 2400 hours of 15KhSND steel base metal (1) and HFMI treated metal (2).