Corrosion inhibitors reviews & application examples
in the oil and gas industry



Successful corrosion and ARPD control in oil production

Successful corrosion and ARPD control in oil production

Problematics of the facility in oil production:

high corrosion rates stimulated by high content of hydrogen sulfide (H2S) and significant amounts of asphalt-resin-paraffin deposits (ARPD).

There are different methods of controlling paraffin deposits. One of promising control method is chemical method of using ARPD inhibitors. The method of inhibitor control is very technologic. However the efficiency of well-known ARPD inhibitors is insufficiently high, large reagent consumption per ton of oil is required. One of the most promising methods for inhibitors creation is the directed synthesis of surface-active compounds. This method is high-technology and labour-consuming. In this regard arises the need to create reagents of complex effect – inhibitors that are more efficient in ARPD control, comparing to efficiency of separate reagents that have such a qualities as corrosion control, antioxidant and antibacterial properties.

Read more



Corrosive gases СО2 and H2S in the stream of produced oil and gas condensate

Particular properties of corrosion control in Persian Gulf countries

Corrosive gases СО2 and H2S in the stream of produced oil and gas condensate

Oil and gas industry, as a rule, works in very hard conditions, such as deserts and deep sea. In such conditions, corrosion is very serious and difficult for solving problem. In desert conditions the following factors can contribute to corrosion: variation of wet and dry weather, high temperatures (about 50°C) and high humidity for the most part of the year, the salinity of the groundwater. Also, typical for this region existence of the large number of corrosive gases СО2 and H2S in the stream of produced oil, gas condensate and gas stimulate the destructive corrosion processes. Losses from corrosion can be significantly reduced by using a number of known and effective methods. One of them, and the most simple, cheap and efficient is using corrosion inhibitors H2S and CO2.

Read more


protection of Gas turbine with vanadium corossion

Gas turbine with vanadium corossion

Gas turbine corrosion

Facility problem: Significant quantity of vanadium in residual fuel (50 ppm) while using gas turbine and as the result the high corrosion rate of the equipment.

The biggest complications are caused by ash deposits on the blades of the turbines, because they reduce its useful capacity and efficiency and also significantly reduce the terms of turbines work between pauses for deposits removal. Even more complications in the process of gas turbines work are caused by presence of vanadium in the oil, that results significant corrosion of turbine’s equipment. The work duration of some turbines on the residual oil fuel, with the high content of sodium, sulfates, vanadium is only 200-300 h. The formation of the deposits on the blades of turbines of low melting salts – ash deposits - is the the reason of metal corrosion in the condition of high temperatures. The formation of the cinder deposit and deposits on hot surfaces of diesel or gas turbine happens because of sticking of baked ash, which are produced in the process of low-volatility fuel combustion.

Read more

Sweet gas corrosion protection

Sweet gas corrosion protection

Peculiarities of metal equipment protection during the production of sweet hydrocarbon gas

A considerable amount of CO2 in natural gas or gas condensate becomes a problem due to high corrosive activity of this gas in relation to metals in the medium with even minimum amount of water. The natural gas that actually does not contain hydrogen sulfide, but contains carbon dioxide gas is usually classified as sweet. The corrosion occurring during the production and transportation of sweet gas is determined by dissolution of CO2 in water that results in the formation of carbon dioxide and H+ ions. In this case the corrosion damages mostly will be of pit and honey-comb nature; it is just this feature that makes corrosion so dangerous.

Read more


corrosion inhibitors for circulating water systems

Corrosion inhibitors for circulating water systems

Water-soluble corrosion inhibitors for aqueous systems

The problem of protection of metallic equipment from corrosion is highly relevant in the household, and especially, in industrial cooling systems with circulating water, working in a closed cycle. In practice, for protection against corrosion of the equipment specified cycles, various reactants may be used. However, in some cases, their use has significant drawbacks. For example, corrosion inhibitors based on sodium nitrite protect from corrosion at very high concentrations (at least 1.4 g / dm3) at pH of not less than 10. At concentrations of such inhibitors below 100-150 mg / dm3 it is possible stimulation of the local types of corrosion, biofouling, and the ignition of the workwear and other textiles during the drying up of the inhibitor solutions in air. Chromate-based products have a very high toxicity, and inhibitors based on poly- and glassy phosphates, due to their interaction with hardness salts, drastically reduce their activity and form the water-insoluble deposits in the system. Products containing benzotriazole and tolyltriazole drastically reduce the protective effect at the chloride content in water higher than 250 mg / dm3 and are carcinogenic, i.e. can cause cancer.

Read more

corrosion inhibitors for circulating water systems

Protection of metal from the hydrogen sulfide corrosion

Corrosion inhibitors for systems with a high content of hydrogen sulphide (H2S) in the produced fluids

Since the discovery and development of oil and gas fields containing hydrogen sulfide in the production wells, the problem of protection of metal from the hydrogen sulfide corrosion arose acutely. Hydrogen sulfide H2S is aggressive gas, provoking acid corrosion, which in this case is called the hydrogen sulfide corrosion. Dissolving in water, it forms a weak acid, which can cause pitting in the presence of oxygen or carbon dioxide.

Read more


corrosion inhibitors in the wastewater of oil fieldsirculating water systems

Study of protective properties of DEFENDER corrosion inhibitors in the wastewater of oil fields

Corrosion inhibitors for systems with a high content of hydrogen sulphide (H2S) in the produced fluids

This post presents the results of research of protective properties of hydrocarbon-soluble polyfunctional corrosion inhibitors of DEFENDER series, developed and produced by the Himipex Oil Company. At present time these inhibitors are successfully used to protect against corrosion of equipment in the oil and gas industry and differ from a number of inhibitors of similar purpose by greater versatility.

Read more