THE DEVELOPMENT OF HEAT-RESISTANT PAINTS FOR METALS
Abstract
Progress on a project to prepare and evaluate air-drying, heat-resistant coatings for metal surfaces is reported. The coatings are made by reacting phosphorus compounds with metal oxides or ceramic frits. Coatings based on zinc oxide, dimethyl hydrogen phosphite, and ethyl acid phosphate withstood exposure to weather for 6 mo but failed at 8 mo. Coating thickness has been shown to be an important factor in the formation of satisfactory coatings. X-ray diffraction studies have indicated that zinc oxide is the only crystalline material in coatings prepared from zinc oxide, dimethyl hydrogen phosphite and ethyl acid phosphate. This indicates that the binder material is amorphous in character. Coatings prepared with colloidal alumina or magnesium aluminate spinel in combinations with phosphorus-containing liquids did not cure to dry, homogeneous coatings. Addition of other oxides to coating compositions made with zinc oxide or magnesium oxide as the basic metal oxide has shown promise for improving the hardness of coatings. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 15, 1961
- Accession Number
- AD0264446
Entities
People
- A.e. Raeuber
- Stanley E. Mileski
Organizations
- Southern Research