Effects of Alloying Elements (Cr, Mn) on Corrosion Properties of the High-Strength Steel in 3.5% NaCl Solution

Table 5

Results on XRD qualitative analysis of nonadherent rusts (NARs) formed for 56-day exposure in 3.5% NaCl solution according to the internal standard method.

Alloys	Phase fraction (wt.%)
	Goethite	Akaganeite	Lepidocrocite	Spinel oxide	Hematite	Total
REF	0.2	0.0	10.8	4.7	7.4	21.1
18Mn	1.0	0.0	9.9	5.3	4.0	20.2
18Mn5Cr	4.2	0.0	10.3	0.3	4.6	19.4

Magnetite or maghemite.