| 摘要 |
An oxygen scavenger composition is effective in reducing oxygen-induced corrosion in aqueous systems that contain water, oxygen and a significant proportion (at least about 20 wt %) of a glycol, such as monoethylene glycol (MEG). The oxygen scavenger composition contains a sulfite, a transition metal salt, and a stabilizer to enhance the kinetics of oxygen removal (scavenging). The oxygen scavenger composition is particularly suitable when the transition metal salt component includes at least two different transition metals together, such as Ni and Co, or Ni and Mn. |
| 主权项 |
1. A method to reduce oxygen-induced corrosion in an aqueous system comprising:
contacting the aqueous system comprising water, oxygen and a glycol with an effective amount of an oxygen scavenger composition to reduce oxygen-induced corrosion therein, the oxygen scavenger composition comprising:
at least one sulfite compound selected from the group consisting of sodium sulfite, sodium bisulfite, ammonium sulfite, ammonium bisulfite, sodium meta-bisulfite, potassium sulfite, potassium bisulfite, potassium meta-bisulfite, calcium sulfite, calcium hydrogen sulfite, and combinations thereof,at least one transition metal salt selected from the group consisting of chloride salts, sulfate salts and combinations thereof, where the transition metal salt comprises a transition metal ion selected from the group consisting of nickel, cobalt, manganese and combinations thereof, andat least one stabilizer selected from the group consisting of citric acid, ethylenediaminetetracetic acid, glycolic acid, acetic acid, ethylene diamine, N,N-diethylethylenediamine, diethylene triamine, and salts of these stabilizers, and combinations of these stabilizers and salts thereof; and reducing oxygen-induced corrosion in the aqueous system by scavenging oxygen with the oxygen scavenger composition. |
