The results have shown that the brown alundum coatings are high-class neutral refractory coatings and are used with success in iron and steel cast-ings.

试验结果表明,所研究的棕刚玉涂料是一种优质的中性抗粘砂涂料,适用于粘土砂、水玻璃砂及树脂自硬砂的铸型和型芯.