Table 1 Validation dataset with details of the corrosive environment, corresponding observed experimental corrosion rate^8,9 and predicted corrosion rate by considering the top 13 descriptors and the optimized descriptors.

	Alloy	Corrosion environment			Corrosion rate (mm/year)
	Alloy	pH	Temp (K)	Halide molarity (M)	Experiment	Predicted by top 13 descriptors	Predicted by descriptor optimization
1	Al₂CoCrFeNi	1.301	298	0.05	0.02965	0.05784	0.06498
2	Al₂CrFeNiCoCuTi_1.5	0.301	298	0	0.03558	0.04256	0.04256
3	Fe_68.59Ni_10.47Co_0.21Mo₂Cr_16.61	7	298	0.6	0.00115	0.06145	0.00299
4	Al₂CrFeCoCuTiNi	7	298	0.6	0.10533	0.09907	0.09908
5	Fe_24.85Ni_25.89Co₂₆Mn_0.51Cr_22.66Al_0.07	4	313	0	0.00803	0.00959	0.01394
6	Fe_46.86Ni_12.88Co_12.54Mn_11.72 Cr_15.8Nb_0.16	4	313	0	0.00959	0.07884	0.00339
7	FeCoNiCu	14	298	0	0.01561	0.60843	0.12714
8	FeCoNiCuSn_0.02	14	298	0	0.01177	0.33203	0.01977
9	FeCoNiCuSn_0.03	14	298	0	0.01043	0.336	0.01977
10	FeCoNiCuSn_0.04	14	298	0	0.01532	0.02754	0.01977
11	Co_1.5CrFeNi_1.5Ti0.5Mo_0.1	7	298	1	0.00121	0.00307	0.00307
12	Co_1.5CrFeNi_1.5Ti0.5Mo_0.5	7	298	1	0.00178	0.00414	0.00414
13	Co_1.5CrFeNi_1.5Ti0.5Mo_0.8	7	298	1	0.00355	0.04789	0.00707
14	Co_1.5CrFeNi_1.5Ti0.5Mo_0.1	14	298	0	0.00103	0.00233	0.00229
15	Co_1.5CrFeNi_1.5Ti0.5Mo_0.5	14	298	0	0.00143	0.00233	0.00229
16	Co_1.5CrFeNi_1.5Ti0.5Mo_0.8	14	298	0	0.00216	0.38237	0.38237
17	Al₂CrFeCoCuTiNi_0.5	7	298	0.6	0.25814	0.35711	0.35711
18	Al₂CrFeCoCuTiNi₁	7	298	0.6	0.10533	0.09907	0.09908
19	Al₂CrFeCoCuTiNi_1.5	7	298	0.6	0.52126	0.63757	0.33121
20	Al₂CrFeCoCuTiNi₂	7	298	0.6	0.54881	0.65705	0.33803
21	FeCoNiCuSn_0.02	7	298	0.6	0.0238	0.16663	0.02088
22	FeCoNiCuSn_0.03	7	298	0.6	0.03611	0.17072	0.02088
23	FeCoNiCuSn_0.04	7	298	0.6	1.08367	0.02688	0.02088
24	FeCoNiCuSn_0.05	7	298	0.6	0.0151	0.03016	0.03004
25	FeCoNiCuSn_0.07	7	298	0.6	0.02082	0.03007	0.03004

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