Technical Informations - NBK - #38

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THE HANDBOOK
Chemical Resistance of Titanium Screws
Chemical Resistance of Hastelloy/Inconel/Nickel Screws
Chemical Name
Composition {%)
Titanium
Hydrochloric Acid
10
O
30
X
Sulfuric Acid
10
A
50
X
Nitric Acid
10
®
50
®
Nitrohydrochloric Acid (HCI:HNO3)
3M
®
Chromic Acid
5
®
Hydrofluoric Acid
5
X
Phosphoric Acid
50 (ventilated)
A
Ferric Chloride
10-30
©
Cupric Chloride
10-30
O
Sodium Chloride
10-40
®
Calcium Chloride
50
®
Ammonium Chloride
40
®
Magnesium Chloride
40
©
Ferrous Sulfate
10-50
©
Ammonia
10-30
©
Sodium Hydroxide
50
©
Sodium Carbonate
10
©
Hydrogen Sulfide
Dry Gas
©
Wet Gas
©
Chlorine
Dry Gas
X
Wet Gas
©
Sulfur Dioxide
Dry/Wet Gas
©
Seawater
High Speed Stream
©
Formic Acid
10-50
O
Lactic Acid
50
©
Oxalic Acid
20
X
Citric Acid
10-50
©
Chemical Name
Temperature
Hastelloy
Inconel
Nickel
Diluted Sulfuric Acid
Room Temperature
AA
A
A
Boiling Point
A
D
D
Concentrated Sulfuric Acid
Room Temperature
AA
C
C
Boiling Point
D
D
D
Diluted
Hydrochloric Acid
Room Temperature
AA
B
A
Boiling Point
D
D
D
Concentrated Hydrochloric Acid
Room Temperature
AA
D
D
Boiling Point
B
D
D
Diluted Nitric Acid
Room Temperature
AA
D
D
Boiling Point
AA
D
Concentrated Nitric Acid
Room Temperature
AA
A
D
Boiling Point
D
D
Diluted
Phosphoric Acid
Room Temperature
AA
AA
AA
Boiling Point
AA
-
D
Concentrated Phosphoric Acid
Room Temperature
AA
AA
AA
Boiling Point
B
-
D
Diluted
Sodium Hydroxide
Room Temperature
-
AA
AA
Boiling Point
-
C
AA
Concentrated Sodium Hydroxide
Room Temperature
-
AA
AA
Boiling Point
-
C
AA
AA : Excellent
A : Good
B : Satisfactory
C : Unusable under certain conditions D : Unusable
Caution
» The above is test data on test samples. Chemical resistance values will vary according to usage conditions. Screws should be tested under actual performance conditions prior to use.
Testing Temperature: Room Temperature
® : <0.127 mm/year A :0.508—1.27 mm/year
O:0.127—0.508 mm/year x : > 1.27 mm/year
Hydrochloric acid
Chemical Resistance of Ceramic Screws
Chemical Name
Temperature
Time
Ceramic
35% Hydrochloric Acid
Boiling
30 Minutes
©
70% Sulfuric Acid
Boiling
30 Minutes
©
98% Nitric Acid
Boiling
30 Minutes
©
90% Phosphoric Acid
Boiling
30 Minutes
O
60% Hydrofluoric Acid
20^
24 Hours
A
10% Potassium Hydroxide
80"C
7 Days
©
Potassium Hydroxide
500°C (Boiling)
24 Hours
A
Sodium Hydroxide
500°C (Boiling)
24 Hours
O
Sodium Carbonate
9001C (Boiling)
24 Hours
O
Sodium Sulfate
1000°C (Boiling)
24 Hours
©
Potassium Fluoride
90°C (Boiling)
4 Hours
X
A : Moderate Corrosion x : Heavy Corrosion
© : No Corrosion O : Slight Corrosion
219

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