SFP Micawash No. 15
SFP MICAWASH NO. 15 is the original and finest ladle wash developed for non-ferrous metal casting industry. Micawash No. 15 is water based refractory coating used for prevention of iron (Fe) pick-up by low melting alloys from melting vessels and handling tools. Specifically, this coating is applied on ladles, crucibles, pots, runners, dies and on tools as skimmers, sampling spoons etc. The two main functions of this wash are:
• To ensure a clean and uncontaminated quality casting
• To protect and prolong ladle/tool working life
Directions for Preparation
SFP MICAWASH NO. 15 is sold as a powder to be mixed with water.
1. For spraying – mix 3 pounds of powder with one U.S. gallon (3.78 L) water
2. For dipping or brushing – mix 4 pounds of powder with one U.S. gallon (3.78 L) water
Preferably allow the prepared coating to stand for a few hours prior to use, and keep well stirred before application. Dry container or tool thoroughly before using. This mixing formula is a guide. More or less solids can be used depending on your requirements.
Where a firmer adherence of the coating is desired, add up to 5% of sodium silicate (water glass) by weight to the micawash mixture. This coating is also recommended for zinc (Zn) and lead (Pb) melting. It is applied to room temperature ladles. The ladles may be new or used. It can be re-applied to a ladle that has had the coating chipped or worn off. After applying, the ladle is set on the furnace apron or furnace roof to dry for about two hours. The coating may last all week if it is not chipped or damaged. Typically ladles are changed every 24 hours. The used ones should be recoated until the ladle itself is worn through.
Plastic pails @ 40 lbs or cardboard drums @ 300 lbs
Specialty Coating R-20
SFP R-20 COATING is an odorless, dry, reddish powder consisting of complex inorganic minerals and refractory oxides. It is used on tools, pots, launders and permanent molds.
• Preventing iron pick-up from ferrous tools, pots, ladles etc. during the melting, treating and handling of light and non-ferrous alloys.
• Easing the removal of metal skulls from tools, pots, ladles and launders etc.
• Coating permanent molds in areas (such as risers and gates) where the insulating properties of the coating are desirable to delay the solidification time of the molten metal.
• Preventing interaction between molten metal and materials with which they come into contact at temperatures up to 1900°F
• 1 pound of R-20 to 1 gallon of tepid water
• Stir and heat the mixture to the boiling point
• Add 4 to 6 ounces of a 2:1 ratio sodium silicate (water glass) to this mixture
• Stir, while boiling, until homogeneous
• Allow to cool
• Apply to warm (200°F – 400°F) tools, pots, ladles etc. by spraying, painting or dipping
Ensure the coating is thoroughly dry before using with molten metal.
Fiber drum @ 200lbs and pails @ 30lbs