Corrosion inhibitors Defender









Properties
Characteristics
Recommendations
Ecological information
Aplication industry

Corrosion protection for oil and gas industry

Properties of new generation corrosion inhibitors

Corrosion inhibitors of DEFENDER series and washing and anticorrosive fluids of WINCOR series possess a unique set of technological, operational, and other characteristics.
On the strength of their properties the products of DEFENDER and WINCOR series are among the most effective reagents in the world and have indisputable advantages (due to their polyfunctionality) as compared with other known products of similar intended use.

Protection of

+ Paraffins
+ Corrosion
+ Asphaltene and asphaltik resinous sediments
+ Hydrogen sulfide H2S
+ Carbon dioxide CO2
+ other elements

High corrosion protective effect 
(up to 97- 98 %)

with regard to corrosion of ferrous metals (steel, cast iron), alloy steels.

High thermal stability (up to 300 °C) and antioxidant properties

these inhibitors and fluids are successfully applied for the protection of rectifying columns, condensation and refrigerating equipment, and pipelines in high-temperature processes of oil refining and gas processing, including the high-temperature ones.

High detergent-dispersive and washing properties

the specified inhibitors and fluids successfully wash away diverse depositions from the inner surface areas of process equipment and pipelines, and also prevent their repeated deposition in the systems.

High adsorption properties

the specified products create protective films on metal surfaces that cannot be easily washed away by the liquid flow resulting in a long-term “after-effect” of the products, i.e. the effect of reliable protection of equipment even in case of long interruptions between the product feeds.


Ecological safety

Corrosion inhibitors in case of release into water or soil undergo biodegradation in aerobic and anaerobic conditions
(chemical oxygen demand is 2.5 mg O2/g, biological oxygen demand is 1.8 mg O2/g)



Characteristics of polyfunctional corrosion inhibitors DEFENDER


Polyfunctional inhibitors of DEFENDER series can be used for the protection of metal apparatus and equipment from corrosion occurring under the influence of crude oil, oil products, gas condensate, stratal and bottom waters and water condensates containing emulsified hydrocarbons, dissolved salts and corrosion-active gasses, such as hydrogen chloride, carbon dioxide, hydrogen sulfide and others, and also for the creation of different anticorrosive materials.


Name of indicator DEFENDER -21.3
DEFENDER -31.3
DEFENDER -1115.3
DEFENDER -1122.3
DEFENDER -1124.3
DEFENDER -3115.3
DEFENDER -4215.3
DEFENDER -21.5
DEFENDER -31.5
DEFENDER -1115.5
DEFENDER -1122.5
DEFENDER -1124.5
DEFENDER -3115.5
DEFENDER -4215.5
DEFENDER –21
DEFENDER –31
DEFENDER -1115
DEFENDER -1122
DEFENDER -1124
DEFENDER -3115
DEFENDER -4215
Appearance
Liquid of yellow to dark brown or
dark red color
Liquid of yellow to dark brown or
dark red color
Liquid of yellow to dark brown or
dark red color
Protective effect, %, no less than 90 90 90
Mixing with hydrocarbons (heavy naphtha, kerosene, etc.) Complete Complete Complete
Setting point °C , not higher than Minus 25 (45)* Minus 25 (45)* 16
Water content, %, no more than 2 2 5
Kinematic viscosity at 20 °C, mm²/s, no more than 70 100 -
Kinematic viscosity at 100 °C, mm²/s, no more than - - 250
Density at 20 °C, g/cm³, no more than 0.825 0.850 -
Density at 90 °C, g/cm³, no more than - - 0.850

* For northern regions


Recommendations for application of corrosion inhibitors Defender


HIMIPEX OIL nowadays produces the following grades of polyfunctional corrosion inhibitors of DEFENDER series:

In the oil refining sector: constant dosing into the vapor lines of columns after the introduction of neutralizer (DEFENDER-N type).
Recommended quantities: 2- 6 ppm.
Recommended grades: DEFENDER-1115.3, DEFENDER-1115.5, DEFENDER-1122.3, DEFENDER-1122.5, DEFENDER-1124.3, DEFENDER-1124.5, DEFENDER-3115.3, and DEFENDER-3115.5.

In the gas processing sector: constant dosing into the vapor lines of columns after the introduction of neutralizer (DEFENDER-N type) or simultaneously with the latter.
Recommended quantities: 6 - 10 ppm.
Recommended grades: DEFENDER-1115.3, DEFENDER-1115.5, DEFENDER-1122.3, DEFENDER-1122.5, DEFENDER-1124.3, DEFENDER-1124.5, DEFENDER-3115.3, and DEFENDER-3115.5.

In the sector of oil extraction, gathering and transportation: constant dosing or periodic feeding into the well mouths and pipelines of 5–10% (typical) inhibitor solutions in gas condensate, kerosene, diesel fuel or oil.
Recommended quantities: from 10 ppm.
Recommended grades: - for well mouths: DEFENDER-3115.3, DEFENDER-3115.5, DEFENDER-4215.3, and DEFENDER-4215. 5; - for systems of oil gathering and treatment: DEFENDER-21.3, DEFENDER-21.5, DEFENDER-31.3, DEFENDER-31.5, DEFENDER-3115.3, DEFENDER-3115.5, DEFENDER-4215.3, and DEFENDER-4215.5 (possible need of feeding the demulsifying agents such as DEFENDER-D); - for the reservoir pressure maintenance system (RPM): DEFENDER-21.3, DEFENDER-21.5, DEFENDER-31.3, and DEFENDER-31.5.

For the protection of pump-and-compressor tubing (PCT), extracting columns and well-control equipment of gas condensate and gas wells: constant dosing or periodic feeding into the well mouths of 5–10% (typical) solutions of commercial grade inhibitor in gas condensate.
Recommended quantities: 10 - 20 g per 1000 m³ of gas and (0.01- 0.02 ppm) after the stable protective film of inhibitor is formed on the working surfaces of equipment while using the “shock dosage” technology.
Recommended grades: DEFENDER-3115.3, DEFENDER-3115.5, DEFENDER-4215.3, and DEFENDER-4215.5 (joint use is possible with demulsifying agents of DEFENDER-D type).