高强铝合金焊接接头力学-电化学腐蚀行为与退化规律研究

胡娜, 彭文山, 郭为民, 刘天楠, 段体岗, 刘少通

Mechanical-electrochemical Corrosion Behavior and Degradation Regularity of High Strength Al-alloy Welded Joints

HU Na, PENG Wenshan, GUO Weimin, LIU Tiannan, DUAN Tigang, LIU Shaotong

表3 高强铝合金焊接接头低温海水条件下阻抗拟合结果

Table 3 Fitting results of EIS of the welded joint under low-temperature seawater conditions

Immersion time / d	Pre-stress	R_s / Ω·cm²	R_ct / 10³ Ω·cm²	R_f / Ω·cm²
1	0	10.17	8.805	1.328
	25%σ_s	7.09	5.037	29.45
	50%σ_s	12.74	2.764	32.76
5	0	8.29	7.577	3.659
	25%σ_s	10.32	4.237	1.489
	50%σ_s	6.554	0.865	2.489
10	0	13.3	3.850	847.2
	25%σ_s	6.679	3.783	29.03
	50%σ_s	8.834	1.453	149.4
20	0	7.81	3.409	2200
	25%σ_s	8.593	1.564	3.391
	50%σ_s	6.725	0.789	538.9