Cleaning operations often require a specific environment. Any improper operation may lead to the cleaning work not meeting expectations. From the perspective of cleaning agents alone, this article sorts out common problems and their solutions.

I.The workpiece is not cleaned thoroughly.

1.The concentration used is too low and needs to be increased.

2.The cleaning temperature is too low and has not reached the specified operating temperature. It needs to be heated up.

3.The model of the cleaning agent does not match. It needs to be changed to a different model.

II.The workpiece shows signs of rust.

1.If rusting occurs during the cleaning process or if the concentration of the cleaning agent is too low due to a high water-to-agent ratio, the concentration of the cleaning agent used should be increased.

2.The workpieces have been staying in the equipment for too long. In principle, the workpieces should be emptied.

3.Before cleaning, it should be checked whether the workpiece has rusted. The cleaning agent has short-term anti-rust performance, but does not have rust removal function.

III.Foam generation during the cleaning process

1.During the cleaning process, a large amount of foam is produced. First, check whether the cleaning temperature of the equipment meets the standard. As the temperature rises, the foam will decrease accordingly.

2.Check if the usage concentration is normal. Both too high or too low concentrations may cause foaming. If the concentration is normal, or if foaming persists, a defoaming agent can be added in moderation. The conventional maximum addition of the defoaming agent should not exceed 0.5% of the original liquid of the cleaning agent added.

3.Due to long-term use, impurities such as processing fluids from the previous process may mix into the water tank, which can easily cause foaming of the cleaning solution. It is recommended to change the solution or add an appropriate amount of defoamer (defoaming is also recommended in the previous process). The conventional maximum addition amount of defoamer should not exceed 1-2% of the original liquid of the added cleaning agent

4.Check if the water level in the water tank is too high.

5.Check if the working fluid has an unpleasant odor. If the working fluid has gone bad, it can also cause foaming. It is recommended to change the fluid.

6.If the equipment remains idle for a long time, foam will be produced when it is restarted. The foam will gradually disappear after circulation.

IV. The cleaning solution shows signs of spoilage.

If the cleaning solution develops an unpleasant odor during use or if a viscous substance forms on the surface around the water tank, it indicates that the solution has deteriorated and a large number of bacteria have been generated. At this point, the following measures should be taken:

1.If the equipment itself is equipped with a heating device, the temperature of the working fluid can be temporarily raised to 70-80 degrees. At this temperature, circulate the equipment for 30 minutes and add preservative and bactericide.

2.The above-mentioned approach cannot fundamentally change the deteriorated state of the cleaning solution or completely solve the problem of deterioration. It is recommended that the solution be replaced.

3.When the cleaning solution is replaced, if it cannot be completely drained, even a small amount of the deteriorated solution remaining will cause the new solution to deteriorate rapidly within a short period of time. Therefore, when changing the solution, the residue of the deteriorated solution needs to be sterilized.

*If the processing fluid from the previous process goes bad and bacteria are carried into the cleaning fluid, it can also cause the cleaning fluid to go bad.

V. Color Changes Occurring During the Cleaning of Non-ferrous Metals

1.The type of cleaning agent is not suitable for non-ferrous metals. It is necessary to change the type of cleaning agent.

2.Check if the cleaning temperature has changed. If it exceeds the normal temperature, test the cleaning temperature of the water tank.

3.Check and test whether the temperature of the heating and drying equipment is abnormal.

4.Observe whether any abnormalities occur to the workpiece before it enters the cleaning process.