Novel Process for Hard Chromium Plating from Non-Toxic Trivalent Chromium (Cr(III) Plating Bath

EPA Contract Number: 68D40033
Title: Novel Process for Hard Chromium Plating from Non-Toxic Trivalent Chromium (Cr(III) Plating Bath
Investigators: Zhou, Chengdong
Small Business: Faraday Technology, Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1994 through March 1, 1995
Project Amount: $54,648
RFA: Small Business Innovation Research (SBIR) - Phase I (1994) RFA Text |  Recipients Lists
Research Category: SBIR - Pollution Prevention , Pollution Prevention/Sustainable Development , Small Business Innovation Research (SBIR)


Fraday Technology, Inc., proposes to develop a novel process for plating hard chromium coatings from non-toxic, additive-free trivalent chromium (Cr(III)) plating baths. Currently hard chromium coatings are plated from toxic hexavalent chromium (Cr(VI)) plating baths. Plating from Cr (VI) plating baths presents concerns regarding its release to the environment and is a health hazard to operators. Currently, hard chromium coatings (i.e., >25 m) cannot be plated from Cr(III) baths. Commercial baths are available for plating decorative chromium coatings (i.e., <2.5 m), however, these baths contain organic additives and operate at low efficiencies. Consequently, even for decorative applications, Cr(III) baths are not widely used.

The overall objective is to demonstrate a novel process for hard chromium coatings from a additive-free Cr(III) plating bath using production run piston rods from Delco Chassis Division of General Motors. The specific objectives are to demonstrate equivalent or superior corrosion resistance and hardness of their Cr(III) hard chromium coatings compared to hard chromium coatings on finished piston rods plated from state-of-the-art Cr(VI) baths.

Supplemental Keywords:

Hard Chromium Trivalent Additive-Free., RFA, Scientific Discipline, Toxics, Sustainable Industry/Business, National Recommended Water Quality, Chemical Engineering, cleaner production/pollution prevention, Environmental Chemistry, Sustainable Environment, Chemistry, HAPS, Technology for Sustainable Environment, Chemistry and Materials Science, Engineering, Environmental Engineering, hard chromium plating , Chromium, b Chromium VI, non-toxic hard chromium coatings, additive-free trivalent chromium, chromium plating, Chromium Compounds, a Chromium III, hard chromium coatings

Progress and Final Reports:

  • Final
  • SBIR Phase II:

    Novel Process for Functional Chromium Plating from Non-Toxic Trivalent Chromium (Cr(III)) Plating Bath