DESULPHURISATION UNITS DIAGNOSTICS

Timely discovery of locally damaged protective layers, or corroding base material, allows prevention of both financially demanding and time-consuming repairs during emergency and planned shutdown.

Monitoring of the development of protective system properties in the long run (e.g. abrasion resistance, hardness, residual thickness) serves the purpose of timely planning of repairs and renewal of individual layers within the desulphurisation unit.

The results of defectoscopy tests performed during annual shutdown are not just long-term monitoring values, but also identification and recommendations to eliminate defects.

Most non-destructive testing methods are used for the diagnostics, together with the following special inspections:

• Wholeness and intactness of the protective layers using the electrical breakdown method.
• Non-destructive measuring of the protective layer thickness using magnetic induction or eddy current methods.
• Hardness measuring of protection coats by means of Barcol method.
• Test of adhesion of the protective layers using tear off test