ISO 17092:2005 pdf download.Fine ceramics [advanced ceramics,advanced technical ceramics]一 Determination of corrosion resistance of monolithic ceramics in acid and alkaline solutions.
4.4Test fixture for flexural strength, of three- or four-point flexure configuration in accordance with 5.2 oflSO 14704:2000.
NOTE The recommended fixture is fully articulated and of the four-point-1/4 point configuration with the two outerbearings at a distance of 40 mm. The corresponding total length of the test specimen is 45 mm or more.
4.5Micrometer，such as that shown in lSO 3611 but with a resolution of 0,002 mm for measuring thespecimen dimensions. The micrometer shall have flat anvil faces such as those shown in lS0 3611.Themicrometer shall not have a ball tip or sharp tip, since these might damage the specimen.Alternativedimension-measuring instruments may be used,provided that they have a resolution of 0,002 mm or finer.
4.6Vernier callipers, in accordance with IlSO 6906, with a resolution of 0,05 mm or finer for measuring thelength of the test specimen. Alternative dimension-measuring instruments may be used, provided that theyhave a resolution of 0,05 mm or finer.
4.7 Balance, with a sensitivity of at least 0,1 mg.
5 Test solutions
Sulfuric acid or sodium hydroxide solution is used for the test solution.For sulfuric acid solution, prepare thesolution of 3 moll {6 N} concentration with guaranteed reagent as specified in IS0 6353-2, and distilled wateror demineralized water as specified in IS0 3696. For sodium hydroxide solution,prepare the solution of6 molN{6 N concentration with guaranteed reagent as specified in IS0 6353-2 and distilled water ordemineralized water.For solutions other than sulturic acid and sodium hydroxide，prepare the solution ofwhich the concentration becomes 3 molNl. lt is recommended to use the solution volume of 0,5 litre for each corrosion test.
