EN 993的这一部分规定了一种确定致密成型耐火材料抵抗硫酸的方法。注意:使用硫酸，因为它提供了将耐火材料暴露于许多酸（氢氟酸以外）的结果的典型结果

This part of EN 993 specifies a method for determining the resistance of dense shaped refractory products to attack by sulphuric acid. NOTE: Sulphuric acid is used since it gives results which are typical of the results of exposing refractory materials to many acids (other than hydrofluoric acid).