sekundärbad

sekundärbad is a term used in industrial process engineering to describe a secondary immersion bath that follows a primary bath in a sequence of chemical treatments. It is used to continue processing of a workpiece, such as cleaning, rinsing, conditioning, neutralization, corrosion protection, or post-treatment finishing.

The specifics vary by industry, but typical characteristics include a separate tank containing a solution optimized for the next step. Parameters such as temperature, dwell time, pH, and agitation are controlled to achieve consistent results. In metal finishing, a sekundärbad often serves as a post-treatment after an etchant or cleaner bath, neutralizing residual acids or applying a protective layer. In textile processing, it may function as a rinse or fabric conditioner designed to remove residues and improve dye uptake or finish.

Advantages include improved control over surface quality, reduced defects, and the ability to tailor final properties without changing the primary bath. Challenges include chemical compatibility with the primary bath, water usage, waste treatment, and added capital and operational costs.

In practice, sekundärbad is part of a broader bath sequence that may also include rinsing stages, as well as tertiary or quaternary baths depending on the process. See also: primary bath, rinse, post-treatment.