Mn(NO3)2/Na2MoO4对AZ31B镁合金表面磷化膜微观形貌及耐蚀性的影响

Mn(NO₃)₂/Na₂MoO₄对AZ31B镁合金表面磷化膜微观形貌及耐蚀性的影响

崔学军, 白成波, 朱一波, 闵虹云, 王荣, 林修洲

Effect of Additives Mn(NO₃)₂ and/or Na₂MoO₄ on Micro-morphology and Corrosion Performance of Phosphate Coating on AZ31B Magnesium Alloy

CUI Xuejun, BAI Chengbo, ZHU Yibo, MIN Hongyun, WANG Rong, LIN Xiuzhou

表1 与图5极化曲线相对应的拟合电参数值

Condition	Additive / gL^-¹	-E_corr / mV	i_corr / μAcm^-²	R_p / kΩcm²
Base solution	0	1435	5.315	8.401
Mn(NO₃)₂	1.0	1456	2.915	1.057
	1.5	1458	1.057	38
	2.0	1510	3.875	11.012
Na₂MoO₄	0.1	1359	2.027	11.883
	0.25	1327	0.462	55.558
	0.5	1445	6.870	4.252
Na₂MoO₄/Mn(NO₃)₂	0.25/0.5	1423	1.419	36.129
Na₂MoO₄/Mn(NO₃)₂	0.25/1.0	1434	5.235	9.086