1. This product is composed of strong alkali, alkaline salt, phosphate substitutes, hardener, complexing agent, detergent, surfactant, non silicon defoamer, etc. it can be electrolyzed, impregnated, sprayed or brushed at medium temperature. It is widely
used for electrolytic degreasing and chemical degreasing of various color coated boards, hot-dip galvanized steel sheets and other substrates, and can also be used to remove the passive film of galvanized steel sheets.
2 main features
This product is a non phosphorus environmental protection and ecological powdery degreaser, which fundamentally eliminates phosphorus pollution, and also has no toxic and harmful substances such as silicate, chloride, nitrite, chromate,
etc., successfully realizing the unity of environmental protection and treatment quality.
This product has good conductivity, removal of passive film performance and excellent dissolution, dispersion, saponification, emulsification, wetting, washing
performance. It can be used not only for electrolytic degreasing, but also for chemical degreasing.
3 main technical indexes
4. Preparation and maintenance methods
4.1 preparation method: add deionized water or about two thirds of tap
water into the degreasing tank and heat it to 35 ~ 50 ℃, then add coil coating 664 strip degreasing agent according to the preparation concentration (generally 2 ~ 3%), and stir it while adding, add water to the working liquid level after it is completely
dissolved, and finally heat it to the operating temperature. Note that it is best to prepare with deionize water.
4.2 control method of bath solution concentration: generally, it only needs to control the free alkalinity within ± 5% of the rated
value. The establishment of the rated value determines the appropriate free alkalinity value according to the type of inorganic pollutants in the color coated plate or strip steel. The adding method is 1 cubic meter of bath solution, adding 0.6kg degreasing
can increase the free alkalinity by about 1 point.
4.3 relationship between preparation concentration and free alkalinity: the preparation concentration of degreasing agent is determined by the type of inorganic pollutants, treatment time, treatment
temperature, treatment equipment and other factors in the treatment of color coated plate or strip steel. Xianghe sales representative will put forward suggestions according to the specific situation.
4.4 maintenance method of bath solution: the
degreasing bath solution will gradually accumulate grease and dirt with the production of color coated sheet or strip steel galvanizing. When the bath solution is polluted to a certain extent, it must be discarded regularly. Of course, continuous overflow
or automatic overflow device can also be used for dynamic waste management. The ratio control method of total alkalinity and free alkalinity can be used to judge the pollution degree of degreasing tank liquid. Generally speaking, with the addition of
degreasing agent, the total alkalinity of tank liquid will gradually increase, and the ratio of total alkalinity to free alkalinity will also increase. Generally, when the ratio is greater than or equal to 2.2, it should be discarded. However, the maximum
value is related to the material of the color coated plate or strip, the type of solid impurities on the metal surface, and the treatment temperature. The specific maximum value will be determined jointly by Xianghe sales representative and the user.