Process Design and Corrosion Inhibitors

Corrosion rates in mill equipment also depend on the chemical composition within each section of the process. The chemical composition varies from mill to mill depending on the processes involved, the closure of the mill s systems, the desired paper grade, the speed of the process, and the amount of pulp or paper being produced. 

In general, the corrosivity of an environment will increase with an increase in temperature, low pH, dissolved solids content, and chloride and sulfur compound concentrations. Thus by monitoring the process and maintaining the proper temperature, pH, dissolved solids content, chloride, and sulfur compound concentration the extent of corrosion can be controlled. 

In some processes, addition of corrosion inhibitors can control the corrosion. Measurements of the process chemistry should be made to ensure that the correct dosage of inhibitor is maintained. 

---