Yes, halogens can also act as a contaminant affecting product quality and reliability.
For example, one Domino customer – a Far Eastern hard disk drive manufacturer – says:
“Hard disk drive manufacturers have not only increased memory capacity in disk drive assemblies, but have also dramatically increased read / write rates. These performance advances have also greatly increased the sensitivity of the head / disk interface to participate and chemical contamination. Coupled with higher spindle speeds, which generate increased heat, materials inside the drive mechanism may outgas more, depositing residue on critical surfaces in the drive assemblies. These changes in head technology require a new breed of electronically clean components which control out gassing and limit corrosion due to trace contaminants.”