6061 T-6 Aluminum in a the following gas environment?
6061 T-6 Aluminum in a the following gas environment?
(OP)
I am looking to substantiate the use of 6061 T-6 as an actuator valve cap in the following environment:
79.5% Methane
1.55% Ethane
.35% propane
11.77% mole Nitrogen
6.35% mole Carbon Dioxide
.06% mole Hydrogen Sulphide
Dew point of gasses 8.0
Pressure absolute (psia) 264.6
indicated gage pressure (psig) 250
Would this environment pose a corrosive risk for 6061 T-6?
Any thoughts would be greatly appreciated.
79.5% Methane
1.55% Ethane
.35% propane
11.77% mole Nitrogen
6.35% mole Carbon Dioxide
.06% mole Hydrogen Sulphide
Dew point of gasses 8.0
Pressure absolute (psia) 264.6
indicated gage pressure (psig) 250
Would this environment pose a corrosive risk for 6061 T-6?
Any thoughts would be greatly appreciated.





RE: 6061 T-6 Aluminum in a the following gas environment?
Ulig's book has more detailed information regarding AL alloys; Al is not resistant to the following exposures
1. Strong acids
2. Alkalies
3. Mercury and mercury salts
4. Seawater
5. Solutions containing heavy metal ions
6. Chlorinated solvents
7. Anhydrous ethyl, propyl or butyl alcohols at elevated temperature
8. Contact with wet woods
I also checked a design handbook that I have for various seal materials. The listing for Al showed satisfactory performance in exposure to hydrogen sulphide compounds.
RE: 6061 T-6 Aluminum in a the following gas environment?
The problem I have is that such components arn't usually in contact with the process.
Can you elaborate?