ATMOSPHERIC CORROSION BY ELECTROLYTE NUCLEI

Journal Article · Sun Jul 01 04:00:00 EDT 1962 · J. Sci. Ind. Res. (India)

OSTI ID:4693495

Sanyal, B; Bhandwar, D V

The influence of humidity, temperature, period of exposure, and quantity of electrolytes on the rates of corrosion of a number of metals by some representative electrolytes and their mixtures was studied. The salts used were sodium chloride, sodium sulfate, ammonium chloride, and ammonium sulfate. The atmospheric corrosion of mild steel, Al, Cu, Zn, brass, Sn-plate, galvanized Fe, and Pb by the electrolytes, representing the corrosive constituents of metal treatment materials likely to be left as residues on metal surfaces, was investigated under controlled conditions. A new technique was developed for inoculating the metal surfaces with the electrolyte nuclei. The corrosion rates were, in general, in the descending order: mild steel, galvanized Fe, Zn, Cu, brass, tinplate, Pb, Al; only the first 4 though, undergo appreciable corrosion. The chlorides are more corrosive than the sulfates. Corrosion rates increase with increase in humidlty, temperature, period of exposure and concentration of electrolyte on the metal surface. Corrosion is also influenced by the pH of the solution used for inoculating the metal surfaces. In the case of mixtures of electrolytes, the total effect is additive. Increased supply of oxygen is the main factor contributing to enhanced corrosion. (TCO)

• Research Organization: Defense REsearch Lab., Kanpur, India
• NSA Number: NSA-17-022123
• OSTI ID: 4693495
• Journal Information: J. Sci. Ind. Res. (India), Journal Name: J. Sci. Ind. Res. (India) Vol. Vol: 21D
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ALUMINUM
AMMONIUM COMPOUNDS
ATMOSPHERE
BRASS
CHLORIDES
COATING
COPPER
COPPER ALLOYS
CORROSION
ELECTROLYTES
HUMIDITY
IRON
LEAD
METALS
METALS, CERAMICS, AND OTHER MATERIALS
NUCLEI
OXYGEN
PLATES
REACTION KINETICS
RESIDUES
SALTS
SODIUM CHLORIDES
SODIUM SULFATES
SOLUTIONS
STEELS
SULFATES
SURFACES
TEMPERATURE
TIN
ZINC
ZINC ALLOYS