Abstract: A method and biological cleaning system are provided for cleaning substrate surfaces of oils and/or greases using a biological cleaning system which utilizes a pre-treatment bath and/or post-treatment bath as part of the cleaning system. The pre-treatment and/or post-treatment baths are compatible with the biological cleaning bath and during operation of the system, the used pre-treatment and/or post-treatment baths are recycled to the biological cleaning solution for biodegradation. A system is provided in which none of the pre-treatment, post-treatment or biological cleaning baths need expensive waste disposal. Replenishment pre-treatment and/or post-treatment baths as well as biological cleaning baths are added as needed to the biological cleaning system. Other treatment baths may be added directly to the biological cleaning bath with or without pre- or post-treatment for specific purposes such as a detergent phosphating bath used in the biological cleaning tank to provide a cleaned phosphated part.

Abstract: A method and biological cleaning system are provided for cleaning substrate surfaces of oils and/or greases using a biological cleaning system which utilizes a pre-treatment bath and/or post-treatment bath as part of the cleaning system. The pre-treatment and/or post-treatment baths are compatible with the biological cleaning bath and during operation of the system, the used pre-treatment and/or post-treatment baths are recycled to the biological cleaning solution for biodegradation. A system is provided in which none of the pre-treatment, post-treatment or biological cleaning baths need expensive waste disposal. Replenishment pre-treatment and/or post-treatment baths as well as biological cleaning baths are added as needed to the biological cleaning system. Other treatment baths may be added directly to the biological cleaning bath with or without pre-or post-treatment for specific purposes such as a detergent phosphating bath used in the biological cleaning tank to provide a cleaned phosphated part.

Abstract: A method and biological cleaning system are provided for cleaning substrate surfaces of oils and/or greases using a biological cleaning system which utilizes a pre-treatment bath and/or post-treatment bath as part of the cleaning system. The pre-treatment and/or post-treatment baths are compatible with the biological cleaning bath and during operation of the system, the used pre-treatment and/or post-treatment baths are recycled to the biological cleaning solution for biodegradation. A system is provided in which none of the pre-treatment, post-treatment or biological cleaning baths need expensive waste disposal. Replenishment pre-treatment and/or post-treatment baths as well as biological cleaning baths are added as needed to the biological cleaning system. Other treatment baths may be added directly to the biological cleaning bath with or without pre- or post-treatment for specific purposes such as a detergent phosphating bath used in the biological cleaning tank to provide a cleaned phosphated part.

Abstract: An electroless gold plating composition comprises an aqueous solution of alkali metal gold cyanide, alkali metal cyanide, alkali metal hydroxide, a reducer selected from borohydrides and alkyl amine boranes, and a stabilizer having the formula ##STR1## wherein R.sub.1 is --COOH, --OH, --CH.sub.2 OH, or --SO.sub.3 H (or an alkali metal salt thereof), R.sub.2 is --COOH, --OH, --Cl, --H, (or an alkali metal salt thereof) and is disposed in the 2, 5, or 6 ring position, and --NO.sub.2 is in the 3 or 4 ring position. This composition has a pH of 12.5-14.0, is heated at 85.degree.-95.degree. C., and operates at an oxidation/reduction potential of -550 to -700 millivolts to produce high purity gold deposits of amorphous structure and good hardness for electronic applications. The composition may be replenished as many as ten turnovers.

Abstract: A bath for electroplating palladium employs a combination of an aliphatic amine compound and an alicyclic amine compound as metal ion complexing agents.