The quality of water used to dilute die-casting release agents directly affects their lubrication and film-forming performance, as well as the agent’s overall stability.
When heavy metal ions (e.g., Ca²⁺, Mg²⁺) exceed water quality standards, they readily form carbon buildup on mold surfaces, leading to casting defects. Trivalent iron ions (Fe³⁺) may also disrupt the molecular structural stability of the release agent.
Using recycled water or water with high bacterial content can cause flocculation of the release agent, resulting in pipe blockages.
For example, a company once experienced release agent flocculation and pipeline blockages due to excessive bacterial contamination. Testing revealed the total microbial count exceeded industrial limits. After implementing regular pipeline sterilization procedures, the nozzle blockage rate dropped by 50%.
Enterprises are advised to:
Regularly test water electrical conductivity (to monitor ion levels) and microbial content;
Use deionized water (where feasible) to address water quality issues at the source.
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