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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
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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