The results of synthesis and physical-chemical investigations of heat-resistant glass ceramic coatings, which are intended for use as high-temperature corrosion protection for nichrome alloys, using high-alumina waste from the metallurgical industry are presented. The mechanism of sitallization of the glass matrix of the coating as well as the phase composition of the heat-resistant coatings and the nichrome -coating contact layers are determined as functions of the ratio of the bonding activators -NiO and CoO.Resource conservation is now of great importance. This is because new scientific ideas are being used to intensify technologies. The development and practical use of materials with complex, prescribed, physical -chemical and mechanical properties, intended to protect various metals, specifically, nichrome steels and alloys, from corrosive media is an urgent problem whose solution will make it possible to obtain new heat-resistant and chemically stable structural materials.It is known that an effective method of protecting chromium steels and alloys from high-temperature corrosion is to apply a coating with a sitallic structure [1, 2]. Such coatings possess a wide spectrum of properties: they protect metal from high-temperature gas corrosion and damage in metal melts and they possess high thermostability, heat-insulating action, and other properties. In addition, sitallic coatings promote retention of the mechanical strength of alloys and prolong the service life of structures. However, there are comparatively few works on the use of technogenic materials in the field of heat-resistant glass crystal coatings. Thus it is useful to study the possibility of replacing chemically pure components of a coating by technogenic initial material. This permits solving two problems -economic and ecological, which will decrease the consumption of raw materials and permit recycling various industrial wastes.We investigated metallurgical wastes, specifically, alumina-containing wastes (ACW), as a basis for developing heat-resistant coatings which would protect nichrome steels and alloys from high-temperature corrosion.The nichrome alloys Kh20N80 and KhN78T in the form of slabs (20´8´2 m) were used as samples for depositing coatings for commercial tests as well as for laboratory investigations. The nichrome samples were subjected to preliminary mechanical, thermal, and chemical treatment.Together with the preparation of nichrome, we prepared enamel slip, which comprised a colloidal-disperse system of a finely disperse powder of a glass matrix (No. 0063 sieve), distilled water, and additives.The glass-forming composition was chosen on the basis of the system R x O y -Al 2 O 3 -SiO 2 -TiO 2 (R -Li + , Na + , K + , Mg 2+ , Ca 2+ , Ba 2+ , Zn 2+ , Fe 3+ , Mn 4+ ) with no more than 50% 2 SiO 2 in order to prevent undesirable structural changes in the main crystalline phases of the glass matrices and coatings.ACW from the Belokalitvenskii Metallurgical Works were introduced into the mix instead of commercial grade alumina. X-ray p...
