the type of base and filler metals used, joint design, and performance requirements of the finished part, the following general guidelines may be helpful. pre-cleaning (surface preparation) although a proper flux will remove and exclude light oxidation during heating, foreign matter such as grease, oil...
carbon black using tank method and mainly used it as a coloring agent. it was not until when mott found the reinforcement effect carbon black on the rubber before the carbon black industry had gotten rapid development. then it had successively developed of a variety of process methods. at present, oil...