Chemical Resistance of Chemical Resistance Screws

Chemical Resistance of Teflon*Coating

Chemical Name Temperature(℃) Teflon*Coating
SNHS-HTFSWS-TF
10% Hydrochloric Acid 25
50
75
10% Nitric Acid 25
70
30% Sulfuric Acid 25
70
10%Sodium Hydroxide 25
70
10% Ammonium Hydroxide 25
70
Acetone 25
50
Carbon Tetrachloride 25
50
95% Ethyl Alcohol 25
50
Ethyl Acetate 25
50
Toluene 25
50
Benzene 78
  • ◎:No Corrosion
  • 〇:Slight Corrosion

*Teflon is a registered trademark of DuPont.

Chemical Resistance of Incone*・Hastelloy*・and Nickel

Chemical Name Temperature Inconel* Hastelloy* Nickel
Dilute Sulfuric Acid Room Temperature A AA A
Boiling Point D A D
Concentrate Sulfuric Acid Room Temperature C AA C
Boiling Point D D D
Dilute Hydrochloric Acid Room Temperature B AA A
Boiling Point D D D
Concentrate Hydrochloric Acid Room Temperature D AA D
Boiling Point D B D
Dilute Nitric Acid Room Temperature D AA D
Boiling Point AA D
Concentrate Nitric Acid Room Temperature A AA D
Boiling Point D D
Dilute Phosphoric Acid Room Temperature AA AA AA
Boiling Point AA D
Concentrate Phosphoric Acid Room Temperature AA AA AA
Boiling Point B D
Sodium Hydroxide (Diluted) Room Temperature AA AA
Boiling Point C AA
Sodium Hydroxide (Concentrated) Room Temperature AA AA
Boiling Point C AA
  • AA :Excellent
  •  A :Good
  •  B :Useable
  •  C :Useable under certain conditions
  •  D :Non Useable

Also, screws made of special materials such as Inconel*,Hastelloy**,and nickel are available.

*Inconel is a registered trademark of Special Metals Corporation.
**Hastelloy is a registered trademark of Haynes international.Inc.

Chemical Resistance of Titanium

Chemical Name Composition(%) Corrosion Resistance
Pure Titanium SUS304
Hydrochloric Acid 10 ×
30 × ×
Sulfuric Acid 10 -
50 × ×
Nitric Acid 10
50
Nitrohydrochloric Acid
(HCI:HNO3)
3:01 ×
Chromic Acid 5 -
Hydrofluoric Acid 5 × ×
Phosphoric Acid 50(Ventilation)
Ferric Chloride 10 - 30 ×
Cupric Chloride 10 - 30 ×
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
Hydrogen Sulfide Dry Gas × -
Wet Gas -
Sulfur Dioxide Dry Gas -
Wet Gas -
Seawate High Speed Stream -
Formic Acid 10 - 50
Lactic Acid 50
Oxalic Acid 20 × -
Citric Acid 10 - 50

Testing Temperature:Room Temperature

  • ◎:<0.127 mm/year
  • △:0.508 - 1.27 mm/year
  • 〇:0.127 - 0.508 mm/year
  • ×:>1.27 mm/year

Also, titanium screws are available.

A test piece was used to acquire the test data.

Chemical resistance changes with performance conditions.
Always carry out tests under performance conditions similar to actual conditions in advance.

Chemical Resistance of Ceramic

Chemical Name Temperature Hour Effect
35% Hydrochloric Acid Boiling 30 minutes
70% Nitric Acid Boiling 30 minutes
98% Sulfuric Acid Boiling 30 minutes
90% Phosphoric Acid Boiling 30 minutes
60% Hydrofluoric Acid 20℃ 24 hours
10% Potassium Hydroxide 80℃ 7 Days
Potassium Hydroxide 500℃(Boiling) 24 hours
Sodium Hydroxide 500℃(Boiling) 24 hours
Sodium Carbonate 900℃(Boiling) 24 hours
Sodium Sulfate 1000℃(Boiling) 24 hours
Potassium Fluoride 90℃(Boiling) 4 hours ×
  • ◎:No Corrosion
  • 〇:Slight Corrosion
  • △:Moderate Corrosion
  • ×:Heavy Corrosion

●Also, ceramic screws are available.

● A test piece was used to acquire the test data.

● Chemical resistance changes with performance conditions.
Always carry out tests under performance conditions similar to actual conditions in advance.

Chemical Resistance of Plastics

Chemical Name PTFE PEEK VESPEL®
SP-1
VESPEL®
SCP-5000
PPS H-PVC RENY PC PP PVDF
10% Hydrochloric Acid ×
10% Sulfuric Acid ×
50% Sulfuric Acid × × × × -
10% Nitric Acid ×
50% Nitric Acid × × × × × -
10% Hydrofluoric Acid - ×
50% Hydrofluoric Acid × × × × ×
Phosphoric Acid - - ×
Formic Acid ×
Phosphoric Acid ×
Citric Acid
Chromic Acid - - ×
Boric Acid
Methyl Alcohol - -
Glycol - - - -
Ammonia × ×
10% Sodium Hydroxide × -
10% Potassium Hydroxide × ×
Calcium Hydroxide - - ×
Water
Hydrogen Sulfide (Gas) - - -
Sulfur Dioxide - - - -
Ammonium Nitrate - - -
Sodium Nitrate - - - ×
Calcium Carbonate - - - ×
Calcium Chloride - -
Magnesium Chloride - -
Magnesium Sulfate - - -
Zinc Sulfate - - -
Hydrogen Peroxide
  • 〇:Usable
  • △:Usable under certain conditions
  • ×:Non-usable

●A test piece was used to acquire the test data at room temperature (23 deg C).

●Also,plastic screws of various materials with excellent chemical resistance are available.

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