The effects of wine and beer on the corrosion behavior of AISI 304, AISI 316 and AIS 316Ti were i... more The effects of wine and beer on the corrosion behavior of AISI 304, AISI 316 and AIS 316Ti were investigation using the cyclic potentiodynamic polarization and gravimetric methods.Physical and chemical parameters of wine and beer were determined before and after the immersion of the steel plates.The corrosion behavior of materilas was evaluated using the conducting cyclic potendiodynamic polarization measurments for localized corrosion. The corrosion potential and the pittimg potential were determinedthrough the application of the cyclic polarization method. Changes caused in the values of the roughness parameter Ra by immersing the samples into electrolytes were also studied.
Abstract The accuracy and reliability of any ultrasonic testing depends on the calibration proced... more Abstract The accuracy and reliability of any ultrasonic testing depends on the calibration procedure and sensitivity settings. In the present experimental research, it has been investigated how the changes of ultrasound beam shape influence the disc size evaluation. It was investigated how three selected factors and their interactions affect the disc size evaluation when probe frequencies are changing what is in correlation with changing the ultrasound beam shape. The experiment revealed that different factors and their interactions are significant for disc size evaluation.
Kao dio upravljanja kvalitetom postrojenja i sustava cesto se provodi ultrazvucno mjerenje deblji... more Kao dio upravljanja kvalitetom postrojenja i sustava cesto se provodi ultrazvucno mjerenje debljine (Ultrasonic Thickness Measurement, UTM) za ciju
Kao dio upravljanja kvalitetom postrojenja i sustava često se provodi ultrazvučno mjerenje deblji... more Kao dio upravljanja kvalitetom postrojenja i sustava često se provodi ultrazvučno mjerenje debljine (Ultrasonic Thickness Measurement, UTM) za čiju je primjenu dovoljan pristup s jedne strane mjerene komponente. Ova široko primjenjiva ultrazvučna tehnika daje kvantitativnu informaciju o debljini stijenke i kao takva pripada području mjeriteljske djelatnosti. U radu je provedeno istraživanje i karakterizacija utjecajnih faktora i značajki elemenata ultrazvučnog mjernog sustava na rezultat ultrazvučnog mjerenja debljine stijenke. Teorijskim razmatranjem i provedbom eksperimenata analizirana je značajnost utjecaja pojedinih parametara i njihovih interakcija. Primjenom planova pokusa i odgovarajuće metodologije za analizu rezultata eksperimenata stvoreni su preduvjeti za procjenu mjerne nesigurnosti rezultata ultrazvučnog mjerenja debljine stijenke. Da bi se procijenila mjerna nesigurnost, analizirani su utjecajni faktori na točnost i preciznost ultrazvučnog mjerenja debljine stijenke. ...
The ultrasonic thickness measurement is the most commonly performed technique as a part of qualit... more The ultrasonic thickness measurement is the most commonly performed technique as a part of quality management of systems and constructions. The paper carries out a study of the couplant impact on the wall thickness ultrasonic measurement results. Experimental samples are made from the steel grade S355J0. By performing a theoretical and experimental analysis, it estimates that there exists a significant effect of the particular parameters of the ultrasound transducer, the couplants type and their interactions on the thickness measurement results. An experiment scheme and the appropriate methodology for experimental results analyses create the preconditions for the assessment of the influence of the couplant type, material thickness and the parameters of ultrasound probe to the measurement uncertainty.
The effects of wine and beer on the corrosion behavior of AISI 304, AISI 316 and AIS 316Ti were i... more The effects of wine and beer on the corrosion behavior of AISI 304, AISI 316 and AIS 316Ti were investigation using the cyclic potentiodynamic polarization and gravimetric methods.Physical and chemical parameters of wine and beer were determined before and after the immersion of the steel plates.The corrosion behavior of materilas was evaluated using the conducting cyclic potendiodynamic polarization measurments for localized corrosion. The corrosion potential and the pittimg potential were determinedthrough the application of the cyclic polarization method. Changes caused in the values of the roughness parameter Ra by immersing the samples into electrolytes were also studied.
Abstract The accuracy and reliability of any ultrasonic testing depends on the calibration proced... more Abstract The accuracy and reliability of any ultrasonic testing depends on the calibration procedure and sensitivity settings. In the present experimental research, it has been investigated how the changes of ultrasound beam shape influence the disc size evaluation. It was investigated how three selected factors and their interactions affect the disc size evaluation when probe frequencies are changing what is in correlation with changing the ultrasound beam shape. The experiment revealed that different factors and their interactions are significant for disc size evaluation.
Kao dio upravljanja kvalitetom postrojenja i sustava cesto se provodi ultrazvucno mjerenje deblji... more Kao dio upravljanja kvalitetom postrojenja i sustava cesto se provodi ultrazvucno mjerenje debljine (Ultrasonic Thickness Measurement, UTM) za ciju
Kao dio upravljanja kvalitetom postrojenja i sustava često se provodi ultrazvučno mjerenje deblji... more Kao dio upravljanja kvalitetom postrojenja i sustava često se provodi ultrazvučno mjerenje debljine (Ultrasonic Thickness Measurement, UTM) za čiju je primjenu dovoljan pristup s jedne strane mjerene komponente. Ova široko primjenjiva ultrazvučna tehnika daje kvantitativnu informaciju o debljini stijenke i kao takva pripada području mjeriteljske djelatnosti. U radu je provedeno istraživanje i karakterizacija utjecajnih faktora i značajki elemenata ultrazvučnog mjernog sustava na rezultat ultrazvučnog mjerenja debljine stijenke. Teorijskim razmatranjem i provedbom eksperimenata analizirana je značajnost utjecaja pojedinih parametara i njihovih interakcija. Primjenom planova pokusa i odgovarajuće metodologije za analizu rezultata eksperimenata stvoreni su preduvjeti za procjenu mjerne nesigurnosti rezultata ultrazvučnog mjerenja debljine stijenke. Da bi se procijenila mjerna nesigurnost, analizirani su utjecajni faktori na točnost i preciznost ultrazvučnog mjerenja debljine stijenke. ...
The ultrasonic thickness measurement is the most commonly performed technique as a part of qualit... more The ultrasonic thickness measurement is the most commonly performed technique as a part of quality management of systems and constructions. The paper carries out a study of the couplant impact on the wall thickness ultrasonic measurement results. Experimental samples are made from the steel grade S355J0. By performing a theoretical and experimental analysis, it estimates that there exists a significant effect of the particular parameters of the ultrasound transducer, the couplants type and their interactions on the thickness measurement results. An experiment scheme and the appropriate methodology for experimental results analyses create the preconditions for the assessment of the influence of the couplant type, material thickness and the parameters of ultrasound probe to the measurement uncertainty.
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Papers by Morana Mihaljević