And impregnation agents are divided into inorganic impregnating agents and organic impregnating agents.

Is constituted by several inorganic inorganic impregnating agents such as sodium silicate. Organic impregnating agents (Impregnant Sealant) is made up of dozens of organic compounds from the preparation of liquid substances. To close seal pores of casting or powder metallurgy. First started using inorganic impregnating agents impregnating processing (Metal Impregnation), later developed organic impregnating agents, because of the advantages it many companies use organic impregnating agents replaced the inorganic impregnating agents, organic impregnating agents after the 3 Upgrading and now widely used is 2 's and 3 's organic impregnating agents, inorganic impregnating agents impregnating effect, so the use of significantly reduced, but since eliminated immerse the high cost of equipment as well as impregnating agent, So the domestic enterprises as well as some developing countries are still using inorganic impregnating agents, along with the social and economic development, will gradually reduce the use of organic impregnating agents.

Mineral casting impregnation sealer (inorganic casting sealant) more heat-resistant than the organic casting impregnation sealant, so in some cases not organic casting impregnation sealant sealer instead of inorganic castings. Impregnant other informal name many trap liquid sealer such as castings castings, because many manufacturers do not come into contact with the infiltration of trapping, so have many nicknames such as casting trap glue, sealant, sealants, casting castings.

Second, impregnation agents (including extracts) performance and requirements:

1 , Impregnating agent basic requirements:

Has good permeability on casting defects, impregnation agents also should be nontoxic, pollution-free, not combustible, stable performance. When impregnating agent cured, solid overall can be formed with the casting, curing impregnating agent has good heat resistance, acid and alkali resistance, solvent resistance, non-reversible (not impregnant liquid or paste) and closer to the mechanical properties of the matrix.

2 New performance requirements, impregnation agents:

In addition to these basic requirements, since many factories and enterprises in infiltration has become a critical production process, therefore immerse the efficiency, energy-saving and consumption-to have a good performance, and more specifically,

New requirement 1, easy to clean:3 minutes wash away residual impregnation agents, including residues in the screw holes.

New requirement 2, short curing time:10 minutes to cure.

New requirement 3, impregnation agents low consumption: less residual impregnant on the workpiece.

Third, the latest generation of organic impregnating agents (3 ):

In order to meet the above 3 points new requirements,1992 year in Japan developed 3 organic impregnating agents, is currently the latest and greatest, fewer suppliers, many well-known large enterprises use, fully meet the above 3 New requirements.

Four,3 organic impregnating agents compared with inorganic impregnating agents:

Third-generation organic impregnant Hui yi 901 , for example,HY-901 is the 1992 research and development during the years working in Japan and put into commercial success, after returning to begin domestic.

In summary, although cheaper than organic inorganic impregnating Agent 10 times, but inorganic impregnating total cost is big, but long-term continuous working temperature is 250¡æ-300¡æ heat components can only use inorganic impregnating. Otherwise, especially mass production, organic impregnation should be used.

Impregnation agent name: at home, impregnation agents call can be called a great variety of very different things, such as casting porosity sealing agent, shrinkage porosity sealer, shrinkage of trapping the liquid casting trap glue, pinhole sealants, casting porosity sealing adhesive agent

Comparison chart