AD TECHNICAL REPORT ARCCB-TR-89030 DETERMINATION OF TRIVALENT CHROMIUM IONS IN CHROMIUM PLA TING SOLUTIONS BY ULTRA VIOLET- VISIBLE SPEC TROPHO TOMETR Y 00 00 CO I. SAMUEL SOPOK DTIC AMEL ECTEIMm- NOVEMBER 1989 US ARMY ARMAMENT RESEARCH, * DEVELOPMENT AND ENGINEERING CENTER CLOSE COMBAT ARMAMENTS CENTER BENET LABORATORIES WATERVLIET, N.Y. 12189-4050 APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED
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DETERMINATION OF TRIVALENT CHROMIUM IONS IN … · UV-visible spectrophotometer. Table XII presents the data for six consecutive Table XII presents the data for six consecutive replicates
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AD
TECHNICAL REPORT ARCCB-TR-89030
DETERMINATION OF TRIVALENT CHROMIUM
IONS IN CHROMIUM PLA TING SOLUTIONS BY
ULTRA VIOLET- VISIBLE SPEC TROPHO TOMETR Y
0000CO
I. SAMUEL SOPOK
DTICAMEL ECTEIMm-
NOVEMBER 1989
US ARMY ARMAMENT RESEARCH,* DEVELOPMENT AND ENGINEERING CENTER
CLOSE COMBAT ARMAMENTS CENTERBENET LABORATORIES
WATERVLIET, N.Y. 12189-4050
APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED
DISCLAIMER
The findings in this report are not to be construed as an -f.;cial
Department of the Army position unless so designated by other au, htr::ea
documents.
The use of trade name(s) and/or manufacturer(s) does not oonst:iute
an official indorsement or approval.
DESTRU'TION NOTI CE
For classified documents, follow the procedures in DoD 520.2>-M,
Industrial Security Manual, Section 11-19 or DoD 5200.1-R, Inforation
Security ?ogrm Reguiation, Chapter IX.
For unclassified, limited documents, destroy by any method that wi2
prevent disclosure of contents or reconstruction of the document.
For unclassified, unlimited documents, destroy when the report is
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The chemical literature lacks a specific and direct analytical method foradequately monitoring trivalent chromium ions (Cr(III)) in chromium platingsolutions during~ the plating process. In this report, a specific and directmethod is presented providing acceptab~le analysis and monitoring of thetrivalent chromium in this process. The optimum, operating range of thetrivalent chromium is 7.5 V/l in.x tr he ehromitnn Plating solutions. Theresulting precisions are in the range of 0.5 to 1.0 g/l, providing adequatemonitoring of these solutions supprted by four years of testing.
DO I 14737 U EDITIOM OF INOV SS IS OBSOLETE UNCLAzISSIFI1ED
SECUIIV CLASSIFICATION OF T")IS PAkGE 'V~va,, Date Entred)
TABLE OF CONTENTS
Pag.e
ACKNOWLEOGEMNTS ............................................................. i
INTRODUCTION ............................................................... I
EXPERIMENTAL PROCEDURE............................. .......................... I
RESULTS AND DISCUSSION .. ..................................................... 2
ASST SEC OF THE ARMY COMMANDERRESEARCH AND DEVELOPMENT ROCK ISLAND ARSENALATTN: DEPT FOR SCI AND TECH I ATTN: SMCRI-ENMTHE PENTAGON ROCK ISLAND, IL 61299-5000WASHINGTON, D.C. 20310-C103
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