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Tracing lines: On the Educational Significance of Drawing KU Leuven

Nancy Vansieleghem
In 1865, the Brussels educational reformer Pierre Temples advocated to take drawing as the cornerstone of education. He criticized that education was modelled on conventions and grammatical rules in order to learn to read and write, this way ignoring the potential of drawing to create new concepts. This paper is also concerned with the significance of drawing in the realm of education. However, not to elaborate on its added value for education, ...

Effect of simulated brazing on the microstructure and corrosion behavior of twin roll cast AA3003 Vrije Universiteit Brussel

Donovan Verkens, Reynier I. Revilla, Ali Kosari, Mert Gunyuz, Cemil Isiksacan, Johannes M. C. Mol, Iris De Graeve, Herman Terryn

Aluminum alloy (AA) 3003 is widely used as fin and tube material in heat exchangers. In these heat exchangers, the tube and fin material are brazed together by means of an AA4xxx alloy. In this study, the effect of a simulated brazing step on the microstructure and corrosion behavior of a twin roll casted (TRC) AA3003 was studied. In particular, the effect of simulated brazing on the corrosion properties of the centre line segregation (CLS) ...

Influence of material related parameters in sea water acidified accelerated test, reliability and electrochemical evaluation of the test for aluminium brazing sheet Vrije Universiteit Brussel

Afshar Norouzi, E. Szala, A. Wittebrood, R. Mulder, J.m.c Mol, J.h.w. De Wit
The most common accelerated corrosion test used for aluminum brazing sheet is the Sea Water Acidified Accelerated Test (SWAAT). However, still some ambiguity exists, indicating that the test suffers from significant scattering of the results.

Keeping the climatic parameters constant, this study elucidates how the variations of the test results are material dependent. Applying a new statistical reliability evaluation and interpretation ...

Improved Corrosion Resistance of Aluminum Brazing Sheet by a Post-Brazing Heat Treatment Vrije Universiteit Brussel

F. N. Afshar, F.d. Tichelaar, M. A. Glenn, Peyman Taheri, M. Sababi, Herman Terryn, Johannes M. C. Mol

This work studies the influence of the microstructure on the corrosion mechanism and susceptibility of as-brazed aluminum sheet. Various microstructures are obtained using postbrazing heat treatments developed to enhance the corrosion resistance of an AA4xxx/AA3xxx brazing sheet. The heat treatment results in a decrease of the matrix Si content within the heat affected zone and an increase of the Si fraction in the α-Al(Fe-Mn)Si phase. ...

Electrochemical depth profiling of multilayer metallic structures: An aluminum brazing sheet Vrije Universiteit Brussel

Afshar Norouzi, Rajan Ambat, C. Kwakernaak, J.h.w. De Wit, J.m.c Mol
Combinatory localized electrochemical cell and glow discharge optical emission spectrometry (GDOES) measurements were performed to obtain a thorough in depth electrochemical characterization of an aluminum brazing sheet. By defining electrochemical criteria i.e. breakdown potential, corrosion potential, cathodic and anodic reactivities, and tracking their changes as a function of depth, the evolution of electrochemical responses through out the ...