静水压力对吉帕级海工钢母材及焊材腐蚀行为的影响

王亚东, 马荣耀, 万晔, 董俊华

Influence of Hydrostatic Pressure on Corrosion Behavior of Base Metaland Welded Joint of GPa-grade Offshore Engineering Steel in 3.5%NaCl Solution

WANG Yadong, MA Rongyao, WAN Ye, DONG Junhua

表2 根据电化学阻抗拟合所得参数

Table 2 The parameters obtained by fitting the electrochemical impedance

Material Pressure Rs Qo, Y Qo, n Ro Wo Qa, Y Qa, n Ra MPa Ω·cm2 mS·s n ·cm2 - Ω·cm2 mS·s0.5·cm2 mS·s n ·cm2 - Ω·cm2 Matrix 0.1 6.44 1.35 × 10-3 0.875 2569 3.95 × 10-2 4.29 × 10-4 0.597 17.24 6 6.79 1.45 × 10-3 0.920 2390 1.74 × 10-2 3.34 × 10-2 0.605 13.31 12 6.89 1.19 × 10-3 0.864 2146 1.65 × 10-3 4.55 × 10-3 0.584 12.84 Welded 0.1 6.68 9.18 × 10-4 0.902 2436 1.24 × 10-2 2.60 × 10-3 0.633 14.59 6 6.56 1.90 × 10-3 0.758 2237 1.88 × 10-2 5.01 × 10-3 0.632 5.525 12 7.58 7.46 × 10-5 1.000 1991 8.45 × 10-3 8.55 × 10-4 0.856 0.687