Alkaline cleaning of tin surfaces

Details Alkaline cleaning of tin surfaces Alkaline cleaning of tin surfaces

1982-11-22

1984-12-25

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 40, 252135, 252156, C23G 118

Patent

active

044901810

ABSTRACT:
A process for cleaning soil, lubricants or other such contaminants from tin surfaces without visibly etching the tin surface by applying aqueous alkaline cleaning solutions to said surfaces. Spraying is a preferred means for contacting the surface with the solutions. The cleaning solutions may be effectively employed at temperatures as low as about 100.degree. F. and thus may be characterized as low temperature cleaners. The cleaning solutions comprise an alkaline component in an amount effective to substantially remove said contaminants from the tin surface and an inhibitor in an amount effective to inhibit or deter etching of the tin surface. The inhibitor is a compound selected from the group consisting of substituted benzenes having at least two or more hydroxy substituents, quinones and substituted quinones.

REFERENCES:
patent: 1744463 (1930-01-01), Gravell
patent: 2428187 (1947-09-01), Wegst et al.
patent: 3653095 (1972-04-01), Dupre et al.
patent: 3681250 (1972-08-01), Murphy
patent: 3956380 (1976-05-01), Henning et al.
patent: 4094701 (1978-06-01), Fekete
Talati et al (I), Br. Corros. J., "Dihydroxy-benzenes as Corrosion Inhibitors for Aluminum-Copper Alloy in Sodium Hydroxide", vol. 10, No. 2, 1975, pp. 103-106.
Talati et al (II), Br. Corros. J., "o-Substituted Phenols as Corrosion Inhibitors for Aluminum-Cooper Alloy in Sodium Hydroxide", vol. 12, No. 3, 1977, pp. 180-184.
Rompps Chemie-Lexikon, 1977, p. 3462.

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