A Corrosion Detection Method for Steel Strands Based on LC Electromagnetic Resonance

Table 11

Comparison table of steel strands detection corrosion rate and real corrosion rate.

Test one				Test two											Test three			Test four				Test five			Test six
Resonant frequency (kHz)	Calculate the rust rate (%)	True rust rate (%)	Standard deviation	Resonant frequency (kHz)	Calculate the rust rate (%)	True rust rate (%)	Standard deviation	Resonant frequency (kHz)	Calculate the rust rate (%)	True rust rate (%)	Standard deviation	Resonant frequency (kHz)	Calculate the rust rate (%)	True rust rate (%)		Standard deviation	Resonant frequency (kHz)		Calculate the rust rate (%)	True rust rate (%)	Standard deviation		Resonant frequency (kHz)	Calculate the rust rate (%)		True rust rate (%)	Standard deviation
370.152	−0.1	0	0.0707	369.964	−0.3	0	0.2121	370.321	0.11	0	0.0778	370.518	0.5	0		0.3536	370.264		0.03	0	0.0212		369.947	−0.4		0	0.2828
371.595	1.3	2.1	0.5656	371.407	1.13	2.1	0.6858	371.764	1.55	2.14	0.4171	372.061	2.06	2.5		0.3111	371.707		1.99	2.3	0.2192		371.390	1.56		1.8	0.1697
373.037	3.28	4.05	0.5444	372.849	3.02	3.89	0.6151	373.206	3.51	4.21	0.4949	373.503	4.3	5.35		0.7424	373.149		3.95	4.5	0.3889		372.832	3.5		3.8	0.2121
374.48	5.24	6.4	0.8202	374.292	4.95	5.9	0.6717	374.649	5.47	6.1	0.4454	374.646	5.6	6.42		0.5798	374.592		5.92	6.4	0.3394		374.275	5.49		5.8	0.2192
375.923	7.21	7.93	0.5091	375.735	6.95	8.2	0.8838	376.092	7.44	7.98	0.3818	376.089	7.8	8.4		0.4242	376.035		7.9	8.3	0.2828		375.718	7.46		7.8	0.2404
377.365	9.19	10.3	0.8131	377.177	8.93	9.87	0.6646	377.335	9.14	9.6	0.3252	377.831	9.76	10.38		0.4384	377.477		9.88	10.2	0.0141		377.160	9.44		10.1	0.4666
378.808	12.12	12.6	0.3394	378.62	10.91	11.93	0.7212	378.977	11.41	12.3	0.6293	379.274	11.56	12.38		0.5798	378.920		11.87	12.4	0.3747		378.603	11.43		12.06	0.4454