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| 5<\/td>\n | Corrosion of metals and alloys\ufffd\u2014 Evaluation of stress corrosion cracking by the drop evaporation … 1\ufffd\ufffd\ufffd Scope 1.1\ufffd\ufffd\ufffd This International Standard 1.2\ufffd\ufffd\ufffd The method results in a threshold stress to fracture, the magnitude of which can be used t… 2\ufffd\ufffd\ufffd Normative references 3\ufffd\ufffd\ufffd Terms and definitions 4\ufffd\ufffd\ufffd Principle 4.1\ufffd\ufffd\ufffd A dilute salt solution is dripped on to a heated tensile specimen of the material under te… 4.2\ufffd\ufffd\ufffd Tests are carried out at different applied stresses and the time to specimen fracture is r… <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | 4.3\ufffd\ufffd\ufffd The elevated temperatures, wetting and drying process and associated concentration of salt… 4.4\ufffd\ufffd\ufffd Evaporation of salt solutions leading to salt concentration at elevated temperature is not… 5\ufffd\ufffd\ufffd Apparatus 5.1\ufffd\ufffd\ufffd System for applying a constant load to a specimen held in a horizontal configuration 5.2\ufffd\ufffd\ufffd Equipment for applying an alternating or direct current of up to about thirty amperes curr… 5.3\ufffd\ufffd\ufffd A reservoir <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 5.4\ufffd\ufffd\ufffd A suitable calibrated device for measuring the surface temperature of the specimen 5.5\ufffd\ufffd\ufffd A device for detecting specimen fracture and recording the time to fracture 5.6\ufffd\ufffd\ufffd Some degree of containment of the test system 6\ufffd\ufffd\ufffd Test specimen 6.1\ufffd\ufffd\ufffd The specimens shall be tensile specimens with a circular cross section in the gauge length. 6.2\ufffd\ufffd\ufffd The specimens shall be prepared from thick sheet, plate, bar, strip or tube. 6.3\ufffd\ufffd\ufffd The specimens shall be cut such that the longitudinal direction of the specimen is paralle… 6.4\ufffd\ufffd\ufffd The specimen shall have a gauge length of 6.5\ufffd\ufffd\ufffd The specimen shall be produced to a fine ground finish ( 6.6\ufffd\ufffd\ufffd After surface finishing, surface contaminants shall be removed by an appropriate cleaning … 7\ufffd\ufffd\ufffd Test solution <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 8\ufffd\ufffd\ufffd Procedure 8.1\ufffd\ufffd\ufffd The specimen is attached to the gripping devices. 8.2\ufffd\ufffd\ufffd The specimen is resistance heated until a steady temperature of 8.3\ufffd\ufffd\ufffd The solution is dripped on to the specimen at a rate of 8.4\ufffd\ufffd\ufffd The load is then applied. The load to be applied shall be a fraction of the load correspon… 8.5\ufffd\ufffd\ufffd The specimen fracture detection system is activated. 8.6\ufffd\ufffd\ufffd The applied current is increased by 8.7\ufffd\ufffd\ufffd The temperature of the specimen shall be measured in the dry region at least once during t… 8.8\ufffd\ufffd\ufffd The test is continued until the specimen fractures, up to a maximum of 8.9\ufffd\ufffd\ufffd The fractured specimen shall be examined to confirm that the failure was due to stress cor… 8.10\ufffd\ufffd\ufffd The test is repeated at other fractions of the yield strength until the minimum stress to… 9\ufffd\ufffd\ufffd Test report <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | Drop rate control <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Surface temperature measurement <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Surface texture parameters \u2014 relevance to stress corrosion cracking <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Corrosion of metals and alloys. Evaluation of stress corrosion cracking by the drop evaporation test<\/b><\/p>\n |