CC BY
11
MODIFIED ANTICORROSIVE PAINT COATINGS
Babakhanovа Мadina Avazovna, scientific employee, Tashkent state technical university, E-mail: polycomft2005@rambler.ru Negmatova Kamila Soyibjonovna, doctor, of the technical sciences, Tashkent state technical university, E-mail: polycomft2005@rambler.ru
MODIFIED ANTICORROSIVE PAINT COATINGS
Abstract: That at process of formation of a composite covering of optimum temperatures hardening the developed composition should consider 120-140 ° C.
Keywords: anticorrosive materials, kaolin, lignin, industrial waste.
Introduction
Many anticorrosive materials are manufactured with application not one but several polymers, their mixes. The properties of such materials depend on structure of a mix, properties of their components and their compatibility, modes ofmixture and subsequent technological processes.
The specificity of polymeric coverings formed from coatings systems, consists that the process of hardening them is connected to course polymers on a substrate finished by formation of above molecular structures, forming a spatial grid [1].
Materials and methods
In this connection we modify epocside resin with cubic rest pentozan of connection (COPC).Composition, developed by us, on a basis rest of pentozan containing combination with epocside pitch of the mark ED-20, filled with various mechanical activated fillers (kaolin, lignin, industrial waste, confirmed with the help of reagent hardening - polyetelinpolyamin.
The formation of defects at hardening coverings usually contacts to destruction of bubbles, hit of a dust-increased humidity of air, non-uniform distribution hardener in oligo measure system and non-uniform hardening of different sites of a surface by a regrouping of structural elements under action of internal voltage.
For estimation of influence of temperature of hardening on time of drying and the physical - mechanical properties of coverings of research are carried out at temperatures from 40 up to 200 ° C. The process of drying of a composition was carried up to a degree 3, characterized by absence of a trace and sticking a paper after removal of
loading in 0,2 H, according to a standard technique [2]. The results of tests are submitted in the table 1.
Results and discussions
As it is shown thermal hardening at temperatures up to 80 ° C passes during long time from 3 till 1,5 hours, thus the generated coverings have not enough high physical -mechanical parameters. The realization of process drying at temperatures 100-180 ° C allows at much small expenses of time to receive completely formed covering, justified by high parameters of hardness describing a degree hardening. The further increase of temperature results to dark a film of a covering.
In domestic and foreign practice for protection of machines, equipment both equipment from deterioration's and corrosion the wide application is found by coverings on the basis of greasiness of the developed polymeric materials providing their long safety in various conditions of operation, and also high physical-chemical, mechanical properties.
It is known, that during operation of the automobile vanish dying covering is exposed to destroying influence of the various factors - water, oxygen, solar radiation, change of temperatures, sulphurous and other gases contained in air of industrial areas, dust, salts etc.
Use of fillers (kaolin, lignin, waste of gold extraction industry) allows considerably to improve a complex of physical-mechanical and operational properties.
For realization of samples on an aggressive resistance as aggressive surroundings used chemical reagent, according to GOST 4204-77. In our work is basically used 30% concentration of H2SO4, density 1,84.
Section 11. Technical science
The test of the not filled and filled composite on 9.403-80 by the method of complete immersing of sam-chemical resistance was carried out according to GOST ples in a solution of a sulfuric acid (table).
Table 1.- Influence of temperature hardening on time of drying of a composition, durability at impact, adhesive and hardness of coverings on a basis CRPC+ED-20
Temperature, ° C Time hardening up to a degree 3.4 Hardness of coverings, relative unit. Adhesive in numbers Durability at impact, kgs.sm
50 3 0.35 2 35
80 2 0.37 2 35
100 1.5 0.40 2 35
120 0.75 0.45 1 40
150 0.5 0.47 1 50
200 0.25 0.45 1 40
In the table the data on preservation of protective properties of coverings with various fillers and without them are submitted.
From the table it is visible, that the specified system binding + kaolin, binding + lignin and binding + waste keeps protective properties without change during 120150 day, at the same time on the not filled samples the attributes of destruction of coverings are marked already ambassador 60-70 day of tests.
Summary
Thus on the basis is higher stated it is possible to conclude, that at process of formation of a composite covering of optimum temperatures hardening the developed composition should consider 120-140 ° C.
That a filler shows a certain positive effect and increases a way of passage of aggressive surrounding into the depth of a matrix. The developed composite polymeric material can be successfully applied for a covering
of units of machines working in aggressive conditions.
Table 2.- Dependence of protective properties of systems chemical resistant coverings with chemical resistant coverings from time of its presence in 30% - H2SO4
The name of a material Duration, day Protective properties,%
100 60
The not filled composite 200 300 40 30
400 25
100 75
Composites filled with kaolin 200 300 65 60
400 60
100 80
Composite filled with lignin 200 300 75 70
400 68
100 90
Composite, filled by a waste 200 300 85 80
400 80
References:
1. Karyakina M. I. Test ofvarnish dying of materials and coverings.- M. Goschimizdat,- 1989.- 280 p.
2. Ravitch B. M. and others. Complex use of raw material and waist.- M. Chemistry,- 1988.- 288 p.
