耐食性比較表チタン
　

Corrosion Medium

(%)
Concentra-
tion

(ºC)   Tempera-
ture

  Corrosion Resistance
Titanium 18-8 stainless steel Hastelloy C
Hydrochloric acid 10 24 ○ X ◎
30 24 X X ◎
10 80 X – ○
30 80 X – △
Sulfuric acid 10 24 △ – ◎
50 24 X X ◎
10 100 X – ◎
50 100 X – ◎

  Nitric acid		 10 24 ◎ ◎ ◎
50 24 ◎ ◎ –
10 100 ◎ ◎ △
50 100 ◎ ○ –

  Aqua regia		 HCI‧HNO³ 24 ◎ X △
  3 : 1 100 ○ – –
Chromic acid 5 24 ◎ – ◎
Hydrogen fluoride 5 30 X X △
Phosphoric acid 10 (aeration) 24 ○ ◎ ◎
50 (aeration) 24 △ ◎ ◎
10 
通氣		 100 X ◎ ◎
10 
通氣		 100 X ○ ◎

Ferric chloride		 10 24 ◎ X ◎
30 24 ◎ X ◎
10 100 ◎ – X
30 100 ◎ – X

Cupric chloride		 10 24 ○ X ○
30 24 ○ X ○
10 100 ○ – –
30 100 ○ – –
Thorium chloride 10 24 ◎ ○ ○
40 24 ◎ ○ ○
10 100   ◎*   ○* ○
40 100   ◎*   ○* ○
Calcium chloride 10 24 ◎ ◎ ◎
50 24 ◎ ○ ◎
10 100   ◎* – ◎
50 100   ◎* X ◎
Ammonium chloride 10 24 ◎ △ ◎
40 24 ◎ – ◎
10 100   ◎* – ◎
40 100   ◎* – ◎
Magnesia chloride 10 24 ◎ △ ◎
40 24 ◎ ○ ◎
10 100   ◎*   △* ◎
40 100   ◎* – ◎
　 　

-

 　 　 　

 Corrosion Medium

(%)
Concentra-
tion

(ºC)   Tempera-
ture

  Corrosion Resistance
Titanium 18-8 stainless steel Hastelloy C
  Ferrous
sulfate 		10 24 ◎ ○ ○
50 24 ◎ ○ ○
10 100 ◎ ○ ○
50 100 ◎ – ○

Ammonia		 10 24 ◎ ◎ ◎
30 24 ◎ ◎ ◎
10 80 ◎ ○ ○
30 80 ◎ ○ ◎
Caustic soda 10 24 ◎ ◎ ◎
50 24 ◎ ◎ –
10 100 ◎ ◎ ◎
50 100 ○ ○ ◎
Carbonic soda 10 24 ◎ ◎ ◎
30 24 – – –
10 100 ◎ ◎ ◎
30 100 ◎ ◎ ◎
Hydrogen sulfide 乾 gas 24 ◎ △ ◎
濕 gas 24 ◎ ○ ○
Chlorine  乾 gas  24 X – ◎
濕 gas 24 ◎ – △
 乾gas  100 – ◎ ○
濕 gas 90 ◎ – △
Sulfur dioxide  乾 gas  30~60 ◎ – –
濕 gas 30~90 ◎ – –
Seawater 高速流 Rapid flow stagnant water 24 ◎ – –
100   ◎* – ◎

Acetic acid		 10 24 ◎ ◎ ◎
60 24 ◎ ◎ ◎
10 100 ◎ ◎ ◎
60 100 ◎ ○ ◎
Formic acid 10 24 ○ ○ ◎
50 24 ○ ○ ◎
10 100 ○ X ◎
30 100 X X ◎

Lactic acid		 10 24 ◎ ○ ○
50 24 ◎ ○ ◎
10 100 ◎ ○ ○
50 100 ◎ X ○

Oxalic acid		 10 24 ○ ○ ○
20 52 X – ○
50 24 – ○ ○
10 100 – – ○
50 100 – X ○

Citric acid		 10 24 ◎ ○ ◎
50 24 ◎ ○ ◎
10 100 ◎ ○ ◎
50 100 X X ◎

* There are some cases in which pitting and other 
     localized  corrosion may be caused )

 

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