alex's blog

Promoting a friend's page

A personal page of Dr. Konstantin Borodianskiy, an expert in the field of non-ferrous (and ferrous - a bit less) alloys casting and preparation, dislocation mechanics, XRD. And just a good guy, if you know what I mean.

Kosta, welcome to club!

נוהל רישום, קיבוע ושמירת תוצאות ניסויים במחקר

רבותיי וגבירותיי הנכבדים העובדים אצלי במחקרים שונים,

נא לקחת בחשבון את הטקסט המשעמם מטה. ואל תגידו שלא הוזהרתם:

1. כל ניסוי במעבדה חייב להיות רשום ומתועד במחברת מעבדה (laboratory journal, log). ניסוי מכל סוג ולכל מטרה שלא רשום ותואר כהלכה אסור באיסור מוחלט.

(גם אם אתה/את חושב(ת) שהניסוי שעשית, אינו חשוב ואינו רלבנטי, זכור/זכרי שהיו לא מעט תקדימים שבהם תגליות נעשו במקרה, ללא כוונה או בטעות).

An update from Ivium

A couple of months ago I received an e-mail from Danny Shahar (the representative of Ivium in Israel), in which he wrote to me about two interesting facts. The first fact was that Ivium Technologies read my blog. And the second fact was that they have considered my criticism concerning the drawbacks of their software for the fitting of EIS results and updated the software.

הסבר והבהרה בנוגע למיילים עם שאלות הסטודנטים שלי

בתחילת כל סמסטר אני מסביר לסטודנטים החדשים שלי שלא כדאי לשלוח לי מיילים עם שאלות הקשורות לקורסים שאני מלמד. אם יש לך שאלה, אז יש לגשת אלי ואני אשמח לענות על כל שאלה שרק אוכל. וכל שנה לפני המבחנים נופל עלי גל של מיילים עם שאלות דחופות הקשורות למבחן שהולך להיות אוטוטו. כנראה כדאי שאכתוב כאן הסבר מפורט ואחר כל אשלח לסטודנטים לינק לכתובה זה.

ובכן, למה אני לא עונה על שאלות הקשורות לקורסים במיילים:

Why do people use large potential ranges in Tafel polarization experiments?

At the conference that I visited some days ago, there were many (more than a dozen) presentations, in which people measured Tafel slopes in for a very large range of potentials. let's say, 0.5-1.0 V cathodically and 1.5-2.5 V anodically relatively to the corrosion potential. Particularly often these very broad potential ranges were used for the Ti / H2O corrosion system.

For me that was quite a surprise, because I know that:

Corrosion 2014 in Gliwice

Chemistry Faculty of Silesian University of TechnologyI am in Poland now at the conference 'Corrosion 2014' hosted by the Silesian University of Technology in Gliwice. The conference is still continuing, but it is already possible to make some first conclusions: briefly, this is a very high level forum, in which many true professionals are taking part.

ZSimpWin can work on a Linux machine

Today I have succeeded to install, launch and use ZSimpWin on a Linux machine. The incredibly simple installation procedure was as follows:

'Anti-Corrosion Methods and Materials' - the most negative experience of paper submission

A month ago we decided to submit a paper for publishing in the Anti-Corrosion Methods and Materials from Emerald Group Publishing. I don't know if it was just a sad coincidence or this is a very weird policy of this journal, but I can now boast of the acquiring of the most negative experience of paper submission in my life. 

Some conversions useful for the corrosion calculations

When we make calculations of the corrosion rates of Mg alloys, we often need to perform some simple conversions. The results are included in essentially any research  paper in the field, while the logics of the development often remains obscured. For that reason I found useful to show the development here.

About the measurement of Tafel slopes

Tafel slopes

The Tafel plot which you can see in the picture, is the most ideal polarization curve that can be. It was built with the data points computed by the Butler-Volmer equation for the following parameters: T = 298K, nc = na = 2 electrons, α = 0.5, io = 10-11 A. Any real polarization curve is 'worse' from the point of view of Tafel analysis.

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