FIELD: foundry. SUBSTANCE: antipenetration wash is composed of, wt %: refractory filler (dust-like quartz, zirconium concentrate, crystalline graphite) 42.0- 55.5, stabilizer (foundry loam, bentonite) 4.0-5.0, liquid glass binder 2.5- 6.5, aluminum sulfate 0.048-0.08, water - the balance. EFFECT: reduced consumption of liquid glass binder, increased thermal stability of antipenetration wash, and improved its process characteristics. 4 cl, 3 tbl
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