Main factors affecting the process of antirust oil degreasing operations
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(1) degreasing temperature
In general, the higher the temperature, the more thorough degreasing. This is because of three reasons, first, the temperature of oil-physical properties change, such as dropping point, high antirust grease, vaseline, solid paraffin, even with high concentrations of alkali at lower temperatures it is difficult to wash. However, when the increase of oil-temperature, the viscosity is reduced, and even the formation of droplets and beneficial to remove. Second, to promote chemical reactions, generally, the temperature rose to 10 degrees to double the speed of chemical reactions. Third, to accelerate the movement of surfactant molecules, thus promoting the role of infiltration, emulsification, dispersion. With increasing temperature, the solution also increased the ability to dissolve dirt. However, not all situations are the higher the temperature the better, a variety of degreasing agent suitable for the temperature range, precipitation in certain types of surfactants, degreasing liquid, high temperature causes the surfactant aggregation as oil beads attached to the surface, resulting in uneven phosphate film blur.
2 debinding time
Degreasing operations, you must ensure that there is enough time to degreasing, pressure spray degreasing time is generally 1.5 to 3 minutes, dipping skim for 5 minutes (depending on the type of greasy dirt and how much may be). Increase the the defatted time, namely to extend the contact time of degreasing liquid oil, thereby improving the degreasing effect. The oil spill is more, skim the time to take the longer. In pipeline operations, often does not allow for too long, it is generally the first jet I skimmed one minute and 3 minutes, and then impregnated with skim.
(3) The mechanical action
In skim through pressure injection or agitation mechanical action is very effective, because the jet when forcing fresh degreasing solution and the surface of the part to have a good contact, and the entire skimmed liquid content uniformity, and help to improve the effect of skim; jet rely on mechanical forces to promote the the degreaser infiltration and sabotage of the oil film, thus effectively forcing the oil out of the part surface; when prompted jet out of parts of the oil spill emulsion and dispersion in the degreasing solution to prevent oil adsorbed to wash the parts on the surface. The mechanical action is particularly important in the defatted. In general, pressure ejection of more than 1 times faster than dipping skim speed. Usually injection pressure (0.1 to 0.2) Mpa (for pressure injection of the degreasing agent must be low foaming in order to avoid excessive foam impact normal operation and degreasing fluid loss), impregnated with skim can not be considered to be stationary impregnated, must be equipped with circulating pump , the solution kept stirring hourly cycle is about five times the bath volume.
Degreaser degreasing effect
Have a great impact on the composition and use of the degreaser degreasing effect. For example, the alkaline degreasing containing surfactant solution skim separate alkaline material. High dropping point and solid or semi-solid fats, solvent cleaning than other degreasing effect effective. In order to improve the emulsification of the oil spill and dispersion capability, an appropriate increase in the content of surfactants in degreasing agent is effective, and the different variety of surfactants and alkaline substances degreasing effect have some differences, a good degreasing agent after extensive testing of its components with each ratio for repeated screening to determine. Alkali degreasing agent containing surfactants, the most effective play a the Wash role is the upper limit of the surfactant critical micelle concentration. During use, degreasing agents will continue to be consumed, so that the concentration decreased, therefore, must be regularly supplemented with a degreasing agent in order to maintain the necessary concentration. Degreasing effect of concentration of the degreasing agent relationship is not straight up, so for demanding skimmed quality, should not take substantial increase in the concentration, while the second skim the way, both a degreasing liquid can be the same , and no extra concentration.
In actual use, you must take into account various factors, so that all factors are controlled in the best condition, so that the skim to achieve satisfactory results.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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Skimmed quality of good or bad depends on the debinding temperature, degreasing, mechanical effects and degreaser four factors.(1) degreasing temperature
In general, the higher the temperature, the more thorough degreasing. This is because of three reasons, first, the temperature of oil-physical properties change, such as dropping point, high antirust grease, vaseline, solid paraffin, even with high concentrations of alkali at lower temperatures it is difficult to wash. However, when the increase of oil-temperature, the viscosity is reduced, and even the formation of droplets and beneficial to remove. Second, to promote chemical reactions, generally, the temperature rose to 10 degrees to double the speed of chemical reactions. Third, to accelerate the movement of surfactant molecules, thus promoting the role of infiltration, emulsification, dispersion. With increasing temperature, the solution also increased the ability to dissolve dirt. However, not all situations are the higher the temperature the better, a variety of degreasing agent suitable for the temperature range, precipitation in certain types of surfactants, degreasing liquid, high temperature causes the surfactant aggregation as oil beads attached to the surface, resulting in uneven phosphate film blur.
2 debinding time
Degreasing operations, you must ensure that there is enough time to degreasing, pressure spray degreasing time is generally 1.5 to 3 minutes, dipping skim for 5 minutes (depending on the type of greasy dirt and how much may be). Increase the the defatted time, namely to extend the contact time of degreasing liquid oil, thereby improving the degreasing effect. The oil spill is more, skim the time to take the longer. In pipeline operations, often does not allow for too long, it is generally the first jet I skimmed one minute and 3 minutes, and then impregnated with skim.
(3) The mechanical action
In skim through pressure injection or agitation mechanical action is very effective, because the jet when forcing fresh degreasing solution and the surface of the part to have a good contact, and the entire skimmed liquid content uniformity, and help to improve the effect of skim; jet rely on mechanical forces to promote the the degreaser infiltration and sabotage of the oil film, thus effectively forcing the oil out of the part surface; when prompted jet out of parts of the oil spill emulsion and dispersion in the degreasing solution to prevent oil adsorbed to wash the parts on the surface. The mechanical action is particularly important in the defatted. In general, pressure ejection of more than 1 times faster than dipping skim speed. Usually injection pressure (0.1 to 0.2) Mpa (for pressure injection of the degreasing agent must be low foaming in order to avoid excessive foam impact normal operation and degreasing fluid loss), impregnated with skim can not be considered to be stationary impregnated, must be equipped with circulating pump , the solution kept stirring hourly cycle is about five times the bath volume.
Degreaser degreasing effect
Have a great impact on the composition and use of the degreaser degreasing effect. For example, the alkaline degreasing containing surfactant solution skim separate alkaline material. High dropping point and solid or semi-solid fats, solvent cleaning than other degreasing effect effective. In order to improve the emulsification of the oil spill and dispersion capability, an appropriate increase in the content of surfactants in degreasing agent is effective, and the different variety of surfactants and alkaline substances degreasing effect have some differences, a good degreasing agent after extensive testing of its components with each ratio for repeated screening to determine. Alkali degreasing agent containing surfactants, the most effective play a the Wash role is the upper limit of the surfactant critical micelle concentration. During use, degreasing agents will continue to be consumed, so that the concentration decreased, therefore, must be regularly supplemented with a degreasing agent in order to maintain the necessary concentration. Degreasing effect of concentration of the degreasing agent relationship is not straight up, so for demanding skimmed quality, should not take substantial increase in the concentration, while the second skim the way, both a degreasing liquid can be the same , and no extra concentration.
In actual use, you must take into account various factors, so that all factors are controlled in the best condition, so that the skim to achieve satisfactory results.
