Comparison of corrosion resistance between titanium and other metallic materials
腐 蝕 媒 Corrosion Medium 組成(%)
Concentration 		溫度(℃)
Temperature 		耐 蝕 性 Corrosion Resistance
Titanium 18-8 stainless steel Hastelloy C
Hydrochloric acid
HCl
鹽酸 		10
30
10
30		 24
24
80
80




-
-


Sulfuric acid
H2SO4
硫酸 		10
50
10
50 		24
24
100
100


-

-
-



Nitric acid
HNO3
硝酸 		10
50
10
50 		24
24
100
100






-

-
Aqua regia 王水 HC1.HNO3
3：1		 24
100

-
-
Chromic acid H2CrO4 鉻酸 5 24 -
Hydrogen fluoride 氟化氫 5 30
Phosphoric acid
H3PO4
磷酸 		10(通氣)
50(通氣)
10(通氣)
50(通氣)		 24
24
100
100









Ferric chloride
FeCl3
氯化鐵		 10
30
10
30		 24
24
100
100




-
-


Cupric Chloride
CuCl2
氯化銅		 10
30
10
30		 24
24
100
100




-
-

-
-
Thorium chloride
氯化鉀		 10
40
10
40		 24
24
100
100

＊
＊

＊
＊


Calcium chloride
CaCl2
氯化鈣		 10
50
10
50		 24
24
100
100

＊
＊

-


Ammonium chloride
NH4Cl
氯化銨		 10
40
10
40		 24
24
100
100

＊
＊
-
-
-


Magnesia chloride
MgCl2
氯化鎂 		10
40
10
40		 24
24
100
100

＊
＊

＊
-


腐 蝕 媒 Corrosion Medium 組成(%)
Concentration 		溫度(℃)
Temperature 		耐 蝕 性 Corrosion Resistance
Titanium 18-8 stainless steel Hastelloy C
Ferrous sulfate
FeSO4
硫酸鐵 		10
50
10
50		 24
24
100
100





-



Ammonia
N H3
銨 		10
30
10
30		 24
24
80
80









Caustic soda

 10
50
10
50		 24
24
100
100






-
Hydrogen Sulfide
N2S
硫化氫
乾GAS
濕GAS
24
24
  




Chlorine
Cl2
氯 氣
 乾GAS
濕GAS
乾GAS
濕GAS		 24
24
100
90

-
 -
-

-


Sulfur dioxide
SO2
亞硫酸氣
乾GAS
濕GAS
30~60
30~90 		 
-
-
-
-
Seawater
海 水
高速流		 24
100
＊ 		-
-		 -
Acetic acid
CH3 COOH
醋 酸 		10
60
10
60		 24
24
100
100








Formic acid
HCOOH
蟻 酸		 10
50
10
30		 24
24
100
100








Lactic acid
CH3CH(OH)COOH
乳 酸 		10
50
10
50		 24
24
100
100








　
Oxalic acid
(COOH)2
草 酸
 10
20
50
10
50		 24
52
24
100
100

-
-
-
-

-



Citric acid
C6H6O7
檸 檬 酸 		10
50
10
50		 24
24
100
100








＊局部性針孔腐融
There are some cases in which pitting and other localized corrosion may be caused.
記號說明
：＜0.127
：＜0.127~0.508
：0.508~1.27
：＞1.27 (Unit : mm/year )
 

 
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