標準號：SAE ARP 5991-2002
中文標準名稱：用庫侖法卡爾費休滴定儀測定多元醇脂和二脂航空潤滑劑中的水濃度的試驗方法
英文標準名稱：Test Method for the Determination of Water Concentration in Polyol Ester and Diester Aerospace Lubricants by Coulometric Karl Fischer Titration
標準類型：E34
發布日期：2002/12/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：E34
國際標準分類號：49.050;75.100
引用標準：ASTM D 6304-1998;ASTM D 6300-1999
適用范圍：The test method describes the procedure for the direct determination of water concentration in polyol ester and diester based aerospace lubricants by the commercially available automated coulometric Karl Fischer titration instrument. The method was validated to cover the water concentration range of 150 to 3500 鎔/g. The method may also be suitable for the determination of water concentrations outside this range and for other classes of fluids, however, the precision statement shall not be applicable for such uses. Knowledge of the water concentration in polyol and diester aerospace lubricants is required since the presence of excess amounts of water can lead to hydrolysis of the lubricant, resulting in corrosion and wear of the lubricated components and degradation of the lubricant. Significant variability observed in inter-laboratory Karl Fischer test results for these lubricants highlighted the need for a standardized Karl Fischer test procedure, specifically suited for these lubricants.