基于正交方法研究阴极保护电位波动下X100管线钢的点蚀行为

戴明杰, 刘静, 黄峰, 胡骞, 李爽

Pitting Corrosion Behavior of X100 Pipeline Steel in a Simulated Acidic Soil Solution under Fluctuated Cathodic Protection Potentials Based on Orthogonal Method

DAI Mingjie, LIU Jing, HUANG Feng, HU Qian, LI Shuang

表2 试验点蚀统计结果及极差分析

Table 2 Pitting statistical results and range analysis of orthogonal test

Test number	Factors				Pitting density mm^-2
Test number	A (potential fluctuation frequency f ) / Hz	B (potential fluctuation range E) / V	C (duty cycleδ) / %	D (total loading time t_t) / d	Pitting density mm^-2
A1B1C1D1	0.5	-0.95~-0.9	30	1	645.167
A1B2C2D2	0.5	-0.95~-0.8	50	2	2379.119
A1B3C3D3	0.5	-0.95~-0.7	70	3	4249.170
A2B1C2D3	0.05	-0.95~-0.9	50	3	4151.511
A2B2C3D1	0.05	-0.95~-0.8	70	1	551.665
A2B3C1D2	0.05	-0.95~-0.7	30	2	1739.147
A3B1C3D2	0.005	-0.95~-0.9	70	2	906.974
A3B2C1D3	0.005	-0.95~-0.8	30	3	3220.642
A3B3C2D1	0.005	-0.95~-0.7	50	1	1293.451
K₁	7273.456	5703.653	5604.956	2490.283	---
K₂	6442.323	6151.426	7824.081	5025.240	---
K₃	5421.067	7281.768	5707.809	11621.323	---
${\overset{ˉ}{K}}_{1}$	2424.485	1901.218	1868.319	830.094	---
${\overset{ˉ}{K}}_{2}$	2147.441	2050.475	2608.027	1675.080	---
${\overset{ˉ}{K}}_{3}$	1807.022	2427.256	1902.603	3873.774	---
Range (R)	617.463	526.038	739.708	3043.680	---
Factor order	3	4	2	1	---
Maximum pitting density combination	0.5	-0.95~-0.7	50	3	---