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Components of refractory coatings

Components of refractory coatings

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  • Time of issue:2021-08-27
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(Summary description)Carrier:Thecarrierisusuallyaliquid,amixtureofwaterorsolvents,inwhichrefractorysolidmaterialsaresuspended. Refractorymaterials:refractorymineralsorcombinationsofmultiplemineralscontainedincoatings,suchasgraphite,zirconandchromite. Suspendingagent,rheologymodifier:Thesecomponentsdeterminehowthecoatingflowsandhangsonthesandmoldorcore. Dispersant:Thedispersantisusedtostabilizetheviscosityofthecoating.Thedispersantchangesthesurfacechemicalpropertiesoftheparticlessothattheparticlesdonotsticktogether. Adhesiveorfilm-formingagent:Theadhesiveisusedtobondtherefractoryparticlestothecoatedsurfaceandtootherparticlesinthecoating. Surfactant:Thethingthatchangesthesurfacetensionofthecarrierissurfactant,whichcanbeusedtoincreasethepermeabilityofthecoatingonthesandcoreandsandmold. Preservatives:Bacteriainpaintcancausesuspensionandviscosityproblems.Preservativescanpreventthegrowthofmicroorganisms. Dyes:Inordertomakethesandcoresformdifferentcontrastsandbeeasytodistinguishduringmodeling,dyesmaybeaddedtothepaint.Thedyesusuallycontainironororganicpigments. (Source:"MODERNCASTING",adaptedfromLiuJincheng'stranslation)

Components of refractory coatings

(Summary description)Carrier:Thecarrierisusuallyaliquid,amixtureofwaterorsolvents,inwhichrefractorysolidmaterialsaresuspended. Refractorymaterials:refractorymineralsorcombinationsofmultiplemineralscontainedincoatings,suchasgraphite,zirconandchromite. Suspendingagent,rheologymodifier:Thesecomponentsdeterminehowthecoatingflowsandhangsonthesandmoldorcore. Dispersant:Thedispersantisusedtostabilizetheviscosityofthecoating.Thedispersantchangesthesurfacechemicalpropertiesoftheparticlessothattheparticlesdonotsticktogether. Adhesiveorfilm-formingagent:Theadhesiveisusedtobondtherefractoryparticlestothecoatedsurfaceandtootherparticlesinthecoating. Surfactant:Thethingthatchangesthesurfacetensionofthecarrierissurfactant,whichcanbeusedtoincreasethepermeabilityofthecoatingonthesandcoreandsandmold. Preservatives:Bacteriainpaintcancausesuspensionandviscosityproblems.Preservativescanpreventthegrowthofmicroorganisms. Dyes:Inordertomakethesandcoresformdifferentcontrastsandbeeasytodistinguishduringmodeling,dyesmaybeaddedtothepaint.Thedyesusuallycontainironororganicpigments. (Source:"MODERNCASTING",adaptedfromLiuJincheng'stranslation)

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  • Time of issue:2021-08-27
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Carrier: The carrier is usually a liquid, a mixture of water or solvents, in which refractory solid materials are suspended.
 
Refractory materials: refractory minerals or combinations of multiple minerals contained in coatings, such as graphite, zircon and chromite.
 
Suspending agent, rheology modifier: These components determine how the coating flows and hangs on the sand mold or core.
 
Dispersant: The dispersant is used to stabilize the viscosity of the coating. The dispersant changes the surface chemical properties of the particles so that the particles do not stick together.
 
Adhesive or film-forming agent: The adhesive is used to bond the refractory particles to the coated surface and to other particles in the coating.
 
Surfactant: The thing that changes the surface tension of the carrier is surfactant, which can be used to increase the permeability of the coating on the sand core and sand mold.
 
Preservatives: Bacteria in paint can cause suspension and viscosity problems. Preservatives can prevent the growth of microorganisms.
 
Dyes: In order to make the sand cores form different contrasts and be easy to distinguish during modeling, dyes may be added to the paint. The dyes usually contain iron or organic pigments.
 
(Source: "MODERN CASTING", adapted from Liu Jincheng's translation)
 
 
 
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