Reduction of chromium (VI) when solar selective black chromium is deposited in the presence of organic additive

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2069206· OSTI ID:5414415

Popov, B N; White, R E ^[1]; Slavkov, D; Koneska, Z ^[2]

---

1. Dept. of Chemical Engineering, Texas A and M Univ., College Station, TX (US)
2. Faculty of Technology and Metallurgy, Univ. Kiril and Metodij, Skopje 91000 (YU)

Electrochemical dc methods were used to study the reduction of chromium (VI) in the presence of organic additives. In this paper it is shown that F{sup +}, thiourea, and citric acid are essential to enable deposition of black chrome from concentrated chromic acid solutions. A new formulation of the plating bath is defined. The optimum operating conditions under which spectrally selective surface of black chrome is deposited have been determined.

• OSTI ID: 5414415
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 139:1; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
14 SOLAR ENERGY
BLACK CHROME
ELECTRODEPOSITED COATINGS
CHEMICAL REACTION KINETICS
CHROMIC ACID
CITRIC ACID
ELECTROCHEMICAL COATING
SOLAR ABSORBERS
SPECTRALLY SELECTIVE SURFACES
BLACK COATINGS
CARBOXYLIC ACIDS
CHEMICAL COATING
CHROMIUM COMPOUNDS
COATINGS
DEPOSITION
EQUIPMENT
HYDROGEN COMPOUNDS
HYDROXY ACIDS
INORGANIC ACIDS
KINETICS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
SOLAR EQUIPMENT
SURFACE COATING
SURFACES
TRANSITION ELEMENT COMPOUNDS
400400* - Electrochemistry
141000 - Solar Collectors & Concentrators