Лако-красочные материалы — производство

These need to be between about 50 and 100 mg KOH/g, to give adequate bath stability after neutralisation. The actual value depends on the chemistry of the system, and on the crosslinking mechanism envisaged. It is probably best to keep it to the lower end of this range as far as possible, provided the final stability of the bath is good enough. It must be remembered that electrodeposition baths have to run for many months, or even years, and changing the contents of a large bath that has become unstable is expensive and disrupting. It is essential, therefore, to err on the side of caution and not to take any risks with stability. Table 2-5 gives typical values of acid and amine values.