Abstract
The impact of plasma of an arc plasmatron on plasmochemical modification of a two-layer heat-resistant decorative covering on the protecting foam glass blocks is investigated. The optimum technological parameters of plasma processing of such blocks with a preliminary basis of finely divided glass containers and high-quality glass breakage are determined. It is shown that the texture and quality of a two-layer heat-resistant decorative covering are affected by speed characteristics of the plasma torch. It is established experimentally that when the arc-plasma reflow rate is 5 mm /s, a continuous wavy coating is formed on the surface of the foam glass block, and at 10 mm /s – a continuous coating with even spill. Intermediate heat-resistant and basic compositions of decorative two-layer coating for plasma-chemical modification of enclosing blocks of heat-insulating materials have been developed. The intermediate heat-resistant structure includes the following ingredients: heat-resistant aluminous cement, crushed and fractioned high-aluminous refractory material, liquid glass. The basic structure includes mixture of fine ground glass powder of tare and high-quality glasses with the crushed high-aluminous refractory material. The following performance indicators are investigated: adhesion strength of the coating with the matrix, frost resistance, microhardness, acid resistance, water resistance, abrasion resistance, moisture resistance and resistance to neutral salt spray test.
Highlights
Protection of steel pipelines with glass-enamel coatings based on silica-containing raw materials of the far east of Russia // International Journal of Mechanical Engineering and Technology 2018
It is shown that the texture and quality of a two-layer heat-resistant decorative covering are affected by speed characteristics of the plasma torch
It is established experimentally that when the arc-plasma reflow rate is 5 mm /s, a continuous wavy coating is formed on the surface of the foam glass block, and at 10 mm /s – a continuous coating with even spill
Summary
ПЛАЗМОХИМИЧЕСКОЕ МОДИФИЦИРОВАНИЕ БЛОЧНЫХ ТЕПЛОИЗОЛЯЦИОННЫХ МАТЕРИАЛОВ С ДЕКОРАТИВНЫМ ПОКРЫТИЕМ Исследовано воздействие плазмы электродугового плазмотрона на плазмохимическую модификацию двухслойного термостойкого декоративного покрытия на ограждающих блоках пеностекла. Разработаны промежуточные термостойкие и основные составы декоративного поверхностного двухслойного покрытия для плазмохимического модифицирования ограждающих блоков теплоизоляционных материалов. Исследованы такие эксплуатационные показатели блоков пеностекла с двухслойным термостойким декоративным покрытием как прочность сцепления покрытия с матрицей: морозостойкость, микротвердость, кислотостойкость, водостойкость, истираемость, влагостойкость и стойкость к соляному нейтральному туману.
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