Corrosion inhibitors series «Unikor-3»
APPOINTMENT:
- for the protection of underground and surface equipment of oil and gas production wells, installations and pipelines from atmospheric, oxygen, carbon dioxide, hydrogen sulfide and general acid corrosion
- have increased lubricating properties and are used as additives to mineral lubricants in simple units
PRINCIPLE OF ACTION:
- form a protective film on the walls of the equipment that prevents corrosion
- act as absorbers of acidic components of well products
SCOPE OF APPLICATION:
- closed cycle systems at oil and gas sector production and processing facilities (oil and gas installations, production wells, pipelines, transportation systems, liquid hydrocarbon storage systems, formation and wastewater disposal systems, etc.
Characteristics of the line of anti-corrosion products
| Name of the inhibitor | Composition | Type of corrosion | Solubility | Z, %, not less * | |||
| hydrocarbons | aromatic hydrocarbons | alcohols | water | ||||
| Unicor-3.01 and 3.02 | Solution of anti-corrosion additives and surfactants of ionic and non-ionic types in alcohols |
О2, СО2, H2S |
– | – | + | + | 80,0 |
| Unicor-3.03, 3.04 and 3.05 | Mixture of complex amines, fatty acids and surfactants in combination with solvents of organic origin |
О2, СО2, H2S |
+ | + | + | – | 90,0 |
| Unicor-3.06 | Acid corrosion inhibitor, fatty amines | Water solutions HCl | – | – | + | + | 80,0 |
| Unicor-3.07 and 3.08 | Solution of a mixture of fatty amino acids and surfactants in organic solvents | О2, СО2, atmospheric | + | + | – | – | 90,0 |
* Efficiency tests were carried out in accordance with GOST 9.506-87, and in accordance with the standards and requirements for the aggressive environment from the profile mining enterprises of Ukraine.
Product effectiveness in different model environments
| Type of corrosion | Model environment |
С, ppm |
Тenviroment,
˚С |
tеxpos,
h |
The method of inhibition |
Еlectro-chem. method* Z, % |
Grav. method** Z, % |
|---|---|---|---|---|---|---|---|
|
О2, СО2 |
Water 75% + 30 mg/l NaCl + СH3COOH (up to рН=4,0) + Diesel 25% | 150 | +60 | 6 | injection | Not lower than 96,0 | Not lower than 90,0 |
|
О2, СО2, H2S |
Water 75% (3% NaCl +HCl (up to рН 3,5÷4) + 2 g/l H2S) + Diesel 25% H2S gas was obtained from by FeS and HCl reaction: FeS + 2HCl = FeCl2 + H2S |
150 | +60 | 6 | injection | Not lower than 98,0 | Not lower than 90,0 |
| Water solutions HCl | 15% water solution HCl | 1000 | +60 | 6 | injection | Not lower than 85,0 | Not lower than 80,0 |
* Electrochemical studies were carried out using a corrosimeter with bimetallic electrodes.
* * Gravimetric studies were carried out in a hermetic glass autoclave at a temperature of +60˚С, with constant stirring on a magnetic stirrer. The samples are immersed in the corrosion solution in proportion to the content of the model medium so that ¼ of the sample is in the hydrocarbon phase, and ¾ is in the electrolyte for 6 hours.
Foam characteristics *
| С, ppm | V of foam, ml | Tendency to foaming |
|---|---|---|
| Without inhibitor | 120 | Low |
| 200 | 110 | Low |
| 500 | 100 | Low |
| 1000 | 100 | Low |
| 2000 | 100 | Low |
* Testing was carried out on a 25% solution of DEA in water. The initial test volume of liquid, which was taken as “0” – 100 ml.
Emulsifying ability *
The emulsifying ability in the “water-hydrocarbon” system is 1:1, with an inhibitor concentration of 2000 ppm – low. Emulsion separation time – not more than 10 min.
Each manufactured batch is accompanied by original quality passports.