Time

(Days)

Weight loss (g)

HCI

HNO₃

HCIO₄

Uncoated coupon

Coated coupon

Uncoated coupon

Coated coupon

Uncoated coupon

Coated coupon

1

0.3490

0.1346

2.4677

1.7040

0.2975

0.3067

2

0.4573

0.2091

2.5144

1.7855

0.4853

0.5600

3

0.6057

0.2841

2.7345

2.0199

0.6836

0.7929

4

0.8257

0.4256

2.9570

2.2336

0.8984

1.0541

5

1.0074

0.5360

3.0669

2.4968

1.0916

1.4532

6

1.1764

0.6340

3.1332

2.7459

1.2454

1.7359

7

1.2813

0.7888

3.1890

2.9865

1.3822

2.0380