Preventing Toe Cracking in Galvanizing Process with Maskote Zinc Stop-Off
"Learn how Maskote Zinc Stop-Off helps prevent toe cracking during galvanizing by forming a protective layer that inhibits zinc-steel alloying. Contact ZYP Coatings for technical support in Oak Ridge, TN."
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Presentation Transcript
Maskote Zinc Stop-Off To Prevent Toe Cracking during Galvanizing
Maskote Zinc Stop-Off ZYP Coatings Maskote Zinc Stop- Off is a specially formulated solvent-based paint Withstands normal alkaline and acid bath cleaning prior to galvanizing Prevents zinc-steel alloying during galvanizing As an added benefit, Maskote prevents toe crack formation during galvanizing of steel where thin- walled parts are welded to thick- walled parts
How Maskote works Maskote is a proprietary blend of organic and inorganic high temperature materials Once applied and dried, Maskote forms a sealed layer on the metal surface When exposed to heat in the form of molten zinc, Maskote forms a tough carbon char, similar to burnt sugar on a frying pan, which is held onto the metal substrate by a high temperature inorganic binder system The molten zinc is unable to penetrate or remove the Maskote layer, protecting the underlying steel from molten zinc Steel Galvanized steel Maskote char removed Acid/base cleaning Maskote Steel Molten zinc
How Maskote prevents Toe Cracks The mechanism by which Maskote prevent toe cracks is not fully understood. However, by applying Maskote to the welded region, it is preventing the reaction between molten zinc and steel. The welded area is thus unchanged chemically, and mechanical stresses associated with that chemical change should be mitigated. Also, thermal insulation provided by the Maskote layer could reduce the stress on the weld during galvanizing
Contact us ZYP Coatings, Inc. Oak Ridge, TN Phone: (865) 482-5717 Technical support: pritt@zypcoatings.com
