The results of laboratory experiments are presented, in which the essential features of corrosion processes occurring in real oilfield systems are simulated, namely, a high rate of local corrosion, exceeding the corrosion rate by 2…9 times. A standard environment and conditions for laboratory experiments are proposed, which make it possible to reproduce visible and measured with a needle micrometer (> 0,01 mm) local corrosion damage on coupons of corrosion control by the gravimetric method. The protective effect of corrosion inhibitors in relation to local carbon dioxide corrosion at the selected dosage is proposed to be assessed not by the magnitude of the protective effect, but by the presence or absence of local corrosion on the coupons of corrosion control by the gravimetric method after the end of the test. It is shown that with a high protective effect of corrosion inhibitors in relation to corrosion rate, there may b e no protective effect in relation to local corrosion.

The durability and protection effect of mineral-polymer coatings (MPC) on steel developed by SU-57 сompany for heat supply and housing and communal services facilities are determined. The thickness of the coatings is 150…700 μm. It is shown that MPC with a thickness of 150…500 μm in network water at 95 °C are resistant, when kept for 1…8 days, an increase in their mass is observed due to the overgrowth of MPC pores with hardness salts, corrosion products and hydroxides, which is confirmed by micrographs of the MPС surface. The outer layer of the MPC with a thickness of 700 μm is more porous and undergoes the dissolution under these conditions at an insignificant rate. According to the results of determination of the corrosion rate of steel with MPC (by the method of linear polarization resistance) in 3% NaCl at 20° and 95 °C, as well as in network water at 95 °C, coatings with a thickness of 500 and 700 μm have the highest protective ability, 82…89%, the porosity of the coatings is 11…18%. MPP on steel has a high adhesion. The optimal thickness of the MPP for the protection of heat supply and housing facilities according to 11…18%. MPC on steel has a high adhesion. The optimal thickness of the MPC for the protection of heat supply and housing facilities according to the results of the work is 500 μm

Corrosion is one of the complications in the acidizing of the bottomhole zone of the well. Corrosion damage can lead to accidents and product loss. One of the most effective ways to protect metal equipment from corrosion is the use of corrosion inhibitors. Cationic surfactants are mainly used because they are capable of forming protective films on the surface of metals. In this work, studies were carried out to determine the effectiveness of industrial corrosion inhibitors in hydrochloric and sulfamic acids in concentrations of 5, 10, 15 (% wt.). As a result, it was found that in hydrochloric acid, corrosion damage is suppressed due to the adsorption of the inhibitor on the metal surface, while in sulfamic acid there are competing processes of adsorption of sulfamate ions and surfactants.

The issues of operation of mineral wool thermal insulation of pipelines of heating networks are considered, the design features of its advantages and disadvantages are shown on the basis of the experience of the existing operation, the main criteria for increasing the efficiency and operational reliability of thermal insulation structures were determined, which made it possible to create a new improved type of thermal insulation using effective specially developed thermal insulation material s and reliable sealed metal shell.

The modern approaches to solving the problem of energy saving as applied to heating networks are considered. One of the most effective energy saving technologies is the use of polyurethane foam insulation (PPU) for heat supply pipelines. The design of the heat-insulating layer, its features and advantages are described, PUF insulation of heating mains is the most rational method for reducing heat losses and corrosion destruction of heat supply pipelines in the climatic conditions of various Russian regions