Tashkent, Mart 4-5, 2022 1-я международная научная конференция «Современное материаловедение: актуальные проблемы, достижении и инновации» Zamonaviy materialshunoslik: dolzarb

Research methods.
The paper uses standard methods and devices such as IR spectroscopy, 
viscomemetry, methods for the study of hardness, adhesion, tribotechnical properties of dispersed 
systems, and also used experimental, field-observational and generally accepted hydraulic methods, 
drawing up mathematical models based on hydromechanics laws, together with Topics, 
mathematical statistical methods in the processing of experimental data. 
Results and discussion.
The weak link in the mining and chemical industry, for 
hydrotransport of dispersed systems, up to 90% of the total number of damage to which is 
accounted for by corrosion. Due to the use of recently hermetically isolated on the side of the 
structures, the duration of the trouble-free operation of the hydrotransport of dispersed systems is 
determined by corrosion of the inner surface and the pumping of the steel pipe pumps. The 
calculation of the values of the corrosion rate of such sites will allow them to estimate their service 
term of the τ
t
year, in order to predict planned repairs by equation 

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"Modern Materials Science: Topical Issues, Achievements and Innovations" (ISCMMSTIAI-2022) 
357 
𝜏
𝑡
=
(𝑆
𝑜𝑟𝑔
+𝑆
𝑠
)
𝐾𝑤
𝑙
(1) 
where S
org
and S
s
— 
Accordingly, the thickness of the pipe wall on the sortiment and calculated 
according to the strength characteristics, mm (at present, when determining the 
S
s
value, the supply 
of corrosion is not provided); K - the speed of the internal corrosion of the pipe, mm / year; W, - 
local corrosion factor, dimensionless value. To date, an important task is to create a calculated 
methodology for estimating the intensity of corrosion of hydrotransport of dispersed systems, taking 
into account the characteristics of the metal of heat lines, water-chemical, hydrodynamic and 
temperature coolant temperature. The complexity of solving this problem is explained by a plurality 
of parameters affecting a corrosion process, a large zone of their uncertainty associated with a 
significant length of heat transport systems, fluctuation of the concentration of chemical corrosion 
reagents, electric currents, chemical composition of pipe material, etc. 
Earlier [13-14] presents the mechanisms of internal corrosion in hydrotransport dispersed 
systems and the output of the formula, according to its speed. The calculation gives the parameter 
value to several times lower than in real conditions of operation of the hydrotransport, probably due 
to lower solubility values of the C
m
, kg/m
3
, magnetite obtained in laboratory conditions, and 
violations of the water-chemical mode in dispersed systems. Moreover, this difference increased 
significantly with an increase in the inner diameter of d
i
of hydrotransport.
To increase their performance, one of the methods is a modification of dispersed systems 
with low-molecular organic compounds. As a modifier, the State Phase resin is chosen by 
secondary raw materials of little fat production. Polyphenols, fatty acids, hydrocarbons, 
nitrogen and phosphorus-containing compounds, as well as the transformation products of the 
State Psycho, are present in the composition of the State Person. Its appearance is visco -fluid 
mass, color - from a dark brown to the black, acid number of KOH - 50-100 mg, the ash content 
is 1.0-1.2 wt.%, moisture content and volatile substances - up to 4-6%, solubility in acetone-70-
80 wt.%, Specific weight 3-0.98-0.99 g/cm, The number of coeximensions of KOH - 80-130 
mg [2,5,7]. 
The work was used by the State Pharmaceutical resin of oil and waged complexes, obtained 
by distillation of fatty acids at a temperature of 220-2300c, containing in its composition from 40 
to 50% of condensation products, polymerization and state-line interaction products. Modified 
dispersed systems formed in the Metallurgical Combine 1% gosypol resin. To do this, in the model 
(1) it is proposed to enter the function q (d
i
). 
Therefore, in this paper, a refined method of calculating the internal corrosion of the pipes of 
hydrotransports made from carbon steel grade 20 is also proposed. Also, for the convenience of 
calculations on the PС in the procedure under consideration, the approximating functions of C
q 
(t, 
pH) of the solubility of magnetite from the temperature f and hydrogen indicator pH are integrable 
dispersed systems, as well as its density ρ(t) and viscosity µ(t). Considering the above, the rate of 
internal corrosion can be assessed by the following formula: 
К =
𝛽𝑞
р
с
𝜃 𝐶
𝑢
1
𝑘
+(1−𝜒)(
ℎ
𝐷
+
1
ℎ𝐷
)
(2) 
where β — 
coefficient recalculation m/s in mm/year; q - coefficient depending on the parameter 
d
i
; 
р
s
, - density of steel arising on the inner surface, kg/ m
3
; θ- porosity of the dense layer of magnetite, 
pipes, shares; k is the rate of corrosion reaction at the metal - oxide border, m/s; χ is the proportion 
of magnetite in corrosion products (χ = 0,5 for the normalized oxygen concentration in the heating 
system); h is the thickness of the dense layer of magnetite, m (taken according to the results of a 
survey of specific areas of hydrotransports, on average h - 1 10-5 m); 

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