Effects of organic and metal contamination on the etch rate of acid baths - Implications for extended acid use

Andre Ellis, Jennifer Deluhery, Nandakishore Rajagopalan

Research output: ResearchArticle

Abstract

Appreciable quantities of hazardous acid wastes are generated during electroplating operations. These acids are typically disposed of when their etching rates have dropped below some critical threshold. It has often been assumed that the acid etch rates are primarily limited by the build-up in metals concentration. In this paper, we demonstrate that acid etch rates are highly sensitive to the presence of organic/ colloidal impurities. Consequently, the removal of such impurities by soluble silicates, ultrafiltration or carbon adsorption improves the etch rates of acids even in the presence of substantial metal contamination.

LanguageEnglish (US)
Pages42-47
Number of pages6
Specialist publicationPlating and Surface Finishing
StatePublished - Feb 2005

Fingerprint

baths
contamination
acids
metals
Contamination
Metals
Acids
impurities
Impurities
electroplating
silicates
etching
adsorption
thresholds
carbon
Electroplating
Ultrafiltration
Etching
Carbon
Adsorption

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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