There are many manufacturers of metal cleaning agents, but different brands, the cleaning effect of their products will be very different. When people choose, they often have no clue and do not know which one to choose. Finally, I chose a use, but found that the use effect is not good. I mistakenly believe that this is the quality problem of metal cleaning agent (water-based type). How to choose the suitable metal oil cleaning agent (solvent type) has always been the most troublesome for corporate procurement. Question, then what are the things we must know when choosing?
1. Before selecting, first understand the composition and type of the oil to be cleaned, and select the appropriate metal cleaning agent according to the type of oil. For example, the types of oil on auto parts mainly include coke, rust preventive oil, lubricating oil, grease, rust, workers' sweat and other liquid residues in nature.
2。 Avoid cleaning agents causing corrosion on mechanical parts and equipment。 In the mechanical industry, due to special requirements, the composition of the workpiece is different, such as copper, lead, zinc, etc。, these parts are most susceptible to corrosion。 For example, precision instruments, instruments, accessories and other materials with sensitive materials will have certain requirements for the corrosion resistance of cleaning agents。
3, the parts are cleaned centrally, select the appropriate proportion, with the increase of the cleaning concentration, and correspondingly improved, and improve the decontamination ability. The general cleaning concentration, the decontamination ability of the parts displayed by the cleaning parts is not obvious, and when the concentration reaches a certain level, the decontamination ability will increase.
4。 Understand the temperature of the metal industry cleaning agent。 There is a heating process during the cleaning process, during which the decontamination ability will gradually become stronger。 However, if the temperature limit is exceeded, the decontamination ability of the cleaning agent will be reduced, and finally the ability to decontaminate will be lost。 Therefore, each of the different cleaning agents has its own optimum temperature range, and the higher the temperature, the better the detergency of the cleaning agent。 In particular, some cleaning agents contain non-ionic substances。 When heated to a certain temperature, the cleaning agent will appear turbid。 The temperature at this time is called “cloud point”, and the water-soluble active agent is in autumn, and some elements are lost。 Due to the role of elemental decomposition。 Therefore, the cloud point temperature of the nonionic cleaning agent should be controlled below。
5. Use the cleaning agent according to the specified usage time. A cleaning agent can be used on a variety of metal parts, depending on the contamination of the parts and the cleaning method. Under normal circumstances, the solvent-based metal cleaning agent can be used repeatedly.