	Concentration, % by weight	Test Temperature °F °C		Average Corrosion Rate per Year, mils^*
	Concentration, % by weight	Test Temperature °F °C		ULTIMET^® alloy	6B alloy	C-276 alloy	alloy 20CB-3

Hydrochloric Acid	1	Boiling		0.3	170	13	81

Nitric Acid	65	Boiling		6	5434	848	8

P₂O₅ (Commercial Grade)	54	240	116	8	15	28	36

Sulfuric Acid	10	Boiling		99	232	18	22

Sulfuric Acid 1.2% HCL + 1% FeCl₃ + 1% CuCl₂ (ASTM G28B)	23	Boiling		2	2888	55	2720

Sulfuric Acid + 42 g/l Fe₂(SO₄)₃ (ASTM G28A)	50	Boiling		8	14	250	10

* To convert mils per year (mpy) to mm per year, divide by 40.

Comparative Aqueous Corrosion Data on Cast Products

	Concentration, % by weight	Test Temperature °F °C		Average Corrosion Rate per Year, mils
	Concentration, % by weight	Test Temperature °F °C		ULTIMET alloy¹	CX-2MW² (C-22)	AMS 5373 alloy 6¹	CF-3M² 316LSS)

Ferric Acid	10	Boiling		1	156	19989	20925

Nitric Acid	65	Boiling		8	117	2890	14

P₂O₅ (Commercial Grade)	54	240	116	8	13	35	28

Sulfuric Acid	10	Boiling		84	26	7269	634

Sulfuric Acid 1.2% HCL + 1% FeCl₃ + 1% CuCl₂ (ASTM G28B)	23	Boiling		41	27	3181	3557

Sulfuric Acid + 42 g/l Fe₂(SO₄)₃ (ASTM G28A)	50	Boiling		10	71	61	27

¹As-Cast Condition ²Cast + Annealed Condition

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ULTIMET® alloy