Specimen conditioning

Tested ia water at 93°C after 2 weeks immersion at 93°C. Specimens conditioned 200 h ia boiling water. 

Specimen Conditioning. The sample was first placed in the preparation chamber and heated to 350 C. During this first heating in vacuum, there was normally some evolution of gas. The mass spectrum of the gas closely matched that of the tetrafluorethylene monomer. 

ISO 9227 [1] does not specify in detail many necessary parameters and does not determine the precision of such a test method. The precision and accuracy of corrosion determination are influenced by many factors preparation of specimens, conditioning, removal of corrosion products, cleaning, drying, etc. In literature on the corrosion tests we failed to find any information concerning the quality of corrosion tests results. The aim of this paper is to call attention to the problems in the corrosion measurement data quality and the necessity to evaluate the uncertainty for measurement results. We attempted to show the main components of uncertainty of the result in such a measurement on the basis of the experimental evaluation of the corrosivity of the spray test corrosion cabinet by means of reference specimens. 

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