Tham khảo tài liệu 'environmental management in practice part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lengthening Biolubricants Lifetime by Using Porous Materials 381 Tribological analysis Sliding tests DIN 51834-2 With the SRV tribometer reciprocating sliding tests in standard conditions using AISI 52100 steel standard balls and discs can be useful for finding any difference in the behavior of new and aged oils based on the results of friction COF and wear obtained during the tribological tests. Environmental analysis Ready biodegradability OECD 301F If a chemical gives positive in this test will undergo rapid an ultimate biodegradation CO2 H2O in the environment and no further work on the biodegradability on the chemical or on the possible environmental effects of biodegradation products normally is required. Ultimate biodegradation within 28 days higher than 60 according to OECD 301 F. Toxicity algae daphnia OECD 201 OECD 202 . The level al which 50 of the test organisms show an adverse lethal effect. Exponentially-growing cultures of selected green algae or certain percentage of daphnia are exposed to various concentrations of the test substance under defined conditions. The inhibition of growth in relation to a control culture or the inhibition of the capability of swimming of daphnia is determined over a fixed period. The 50 effect level EC50 is chosen the level at which 50 of the test organisms show an adverse lethal effect. Identification of main condition monitoring patterns Regarding traditional lubricating oils all condition monitoring parameters limits and sample frequencies have been already established at different studies. However there is not a clear rule of thumb as small variations occurs in limits and sampling frequencies. Given this the knowledge has been obtained through extensive usage occurred at WearCheck Ibérica Laboratories which has helped to obtain enough expertise to study all condition monitoring fields. Regarding biodegradable lubricating oil parameters that have to be measured an extensive .
