Flux (Soldering) : A sticky liquid or paste used to react with and remove compounds from the surface of the connection, to improve the flow of the molten solder, and to prevent oxidation during the heating cycle
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}