| 摘要 |
1308391 Passivating silver SCHERING AG 26 Feb 1970 [26 Feb 1969] 9285/70 Heading C7U [Also in Divisions C4 and C5] A silver surface is contacted with a solution of a compound having the formula R-NH-CO-CH 2 -SH, where R is an organic group, and a wetting agent or emulsifier. The organic group may be phenyl, naphthyl or sulphathiazolyl groups. Examples of the compound are described. In an example a dipping solution comprises 20g of the compound, 0À5g of a wetting agent which is the sodium salt of diisopropyl-naphthalenesulphonic acid, and 1 kg. of ethanol. |
