Accession Number : ADA312456

Title :   Process Monitoring and Control of Aluminum Anodizing Solutions by Ion Chromatography.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS

Personal Author(s) : Sopok, Samuel

PDF Url : ADA312456

Report Date : MAY 1996

Pagination or Media Count : 16

Abstract : Process monitoring and control of sulfuric and oxalic acids in aluminum anodizing solutions are necessary to produce high-quality coatings for the metal finishing industry efficiently. These high-quality coatings significantly increase resistance to corrosion, wear, and abrasion. The production of military armament system parts requires narrow aluminum anodizing solution tolerances, which increases the need for process monitoring and control. Current instrumental analysis methods do not provide acceptable 95% confidence level precisions for these narrow operating tolerance aluminum anodizing solutions. This report describes an improved ion chromatographical method to provide acceptable process monitoring and statistical control of narrow operating tolerance aluminum anodizing solutions required to produce high-quality coatings. The resultant means and improved 95% confident precisions for typical aluminum anodizing solutions are 160.0 + or - 2.3 g/l sulfuric acid and 16.0 + or - 1.1 g/l oxalic acid, which are both more than a factor of two improvement over current 95% confidence level precisions.

Descriptors :   *IONS, *MONITORING, *PROCESSING, *COATINGS, *ALUMINUM, *CHROMATOGRAPHY, CONTROL, METALS, HIGH RATE, PRODUCTION, CORROSION, WEAPON SYSTEMS, MILITARY EQUIPMENT, RESISTANCE, WEAR, TOLERANCES(MECHANICS), SULFURIC ACID, FINISHES, ABRASION, OXALIC ACID.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Coatings, Colorants and Finishes
      Mfg & Industrial Eng & Control of Product Sys
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE