Compositions and methods for inhibiting corrosion in gas turbine air compressors
View Patent ↗Methods and compositions are disclosed for inhibiting corrosion on metal surfaces of gas turbine air compressors. The methods comprise contacting the metal surfaces with a corrosion inhibiting composition comprising at least one filming amine.
1. A method of inhibiting corrosion or metal surfaces of gas turbine air compressors by contacting said metal surfaces with a corrosion inhibiting composition, said composition having the formula
Polyamine blend
Range (wt %)
cyclohexylamine
0-40
morpholine
0-15
monoethanolamine
7-30
N,N-dimethylaminopropylamine
0-50
N,N-diethylaminoethanol
0-15
(Z)-N-9-octadecenyl-1,3-
5-20
propanediamine
(Z)-9-octadecene-1-amine
1-5
demineralized or deionized water
Balance (0-65).
2. The method of claim 1 , wherein said metal surfaces are exposed to moisture and/or water and/or an aqueous solution during and/or after treatment, and wherein said moisture and/or water and/or an aqueous solution has about 1,000 to 10,000 parts-per-billion (ppb by weight) of dissolved oxygen (O 2 ) therein.
3. The method of claim 1 , wherein the method further comprises contacting said metal surfaces with a citric acid solution before contacting said metal surfaces with said composition.
4. The method of claim 3 , wherein the method further comprises rinsing said metal surfaces with water after contacting said surfaces with said citric acid solution and before contacting said metal surfaces with said composition.