In situ corrosion characterization of simulated weld heat affected zone on API X80 pipeline steel

Corrosion behavior of the weld joint of X80 pipeline steel in an acidic red soil

“…From the results above, at least three factors play important roles in accelerating the corrosion process of the heat affected zone in weld joint. The first factor is the relatively high corrosion sensitivity of the heat affected zone corresponding to previous investigations [17,24,35]. During the separated immersion, the HAZ specimen exhibits the high corrosion current density and the relatively serious corrosion attack, indicating the higher corrosion sensitivity of the HAZ specimen comparing to the WZ and BM specimens (table 3, figures 11 and 13).…”

The effect of pre-deformation on corrosion resistance of the passive film formed on 2205 duplex stainless steel

“…The depressed capacitive semicircles cover almost all frequency regions. The diameter of capacitive semicircle was associated with charge-transfer resistance [18]. An increase in the semicircle radius indicates an increase in the passive film stability [19].…”

Mechanism-related modelling of pit evaluation in the CrNiMoV steel in simulated environment of low pressure nuclear steam turbine

“…Based on the electrochemical etching principle, the whole welded joint will form a large galvanic cell due to the difference of corrosion potentials of BM, WM and HAZ [24][25][26][27][28]. For the WM with the lowest corrosion potential near HAZ, the anode effect will facilitate the rate of pit formation.…”