High-temperature corrosion of heat-resistant chromonickel steel

Resumo

To understand the rapid decline in the working life of 40X24H12CЛ steel gratings in roasting cars in changing operating conditions, the gratings are studied over different operating periods. On that basis, the mechanism of corrosive failure is determined, and the intercrystallite corrosion in the steel after operation for more than three months is analyzed. The surfaces of the part where intercrystallite corrosion is most intense are identified. The influence of the grating’s operating conditions on intercrystallite corrosion is evaluated. Means of enhancing the grating quality are established.