Gamry Instruments designs and manufacturers a variety of electrochemical instrumentation. Our channel provides videos describing the instruments and their operation.
Thank you for your interest. Please contact our Technical Support team - techsupport@gamry.com - they will be able to answer any questions you may have.
Can this device be used in industries? With what electrodes? Is the working electrode the same metal as the tank or does another metal enter the tank? How are the connections?
Thank you for your question. Please contact our Technical Support Team: 1) Email techsupport@gamry.com OR 2)Complete the form on our website: www.gamry.com/support-2/contact-technical-support Thanks again for your support of Gamry Instruments
Hello dear sir i am ising ch instument 0.25A for gcd if i give more current like 0.2 it give me not good result and if i put low voltage like 0.002 it take more time what can i do to solve my problam
Sorry for the delay in responding. Please contact our Technical Support Team either by emailing techsupport@gamry.com or by completing the form submission on our web site at www.gamry.com/support-2/contact-technical-support.
Hello Sir, how we run CCD on different current density in gamry reference 3000. Because there no opption of applying current density value in experiment setup
Thank you for your question. Please contact our Technical Support Team either via emailing techsupport@gamry.com or by completing the form submission on our web site at www.gamry.com/support-2/contact-technical-support.
Is it possible to generate a workeet only with the fitted curve data? I need to plot it on Origin to maintain the pattern of my data, however I can't seem to find how to get only the fitted data.
Hi William. This is possible. Are you using Echem Analyst 1 or our newer Echem Analyst 2? If you reach out to techsupport@gamry.com, one of our engineers would be happy to guide you through this process.
Hi, thanks for the excellent presentation. Quick question, in some cases it is allowed to polarise samples with respect to reference electrode as well as open circuit potential - what is the purpose of this? What happens if one polarised wrt reference instead of ocp, would such lpr data be useful? Thank you
Hello Sehar. Can you clarify what is meant by "stability data"? If possible, please email the data file to techsupport@gamry.com. One of our Applications Engineers can assist you directly with the questions you have.
From the Tafel information can you give a time that the corrosion began? In theory you should be able to. Do you have a video on that or does Gamry have a tutorial on such a thing.
I am making a setup of a single chamber membrane less Microfluidic fuel cell, where I want to measure the efficacy of different anodes (working electrode) on developing biofilm keeping the cathode (carbon cloth as counter electrode) the same with the help of cyclic voltammetry. 1. My question is: Do I need to set three electrodes setup for performing CV? 2. If yes, can I insert the reference electrode in the electrolyte? 3. What if my electrode configuration is interdigitated, where I don't have space for inserting a reference electrode, so shall I go for the two-electrode system? 4. lastly Is it possible to carbon cloth as a counter electrode, as in most the case Pt mesh is considered as a counter electrode
If your KK transform doesn't fit your experimental data how can you change the conditions of your measurement (voltage amplitude....) to improve the fitting? And if it doesn't fit only at low frequencies, does it invalidate the rest of the spectra? In my case it fits the spectra in the high frequency range (which gives the most important information) and deviates later at low frequencies. Thank you in advance.
We do not develop the Orgin software, but we will try and help! It appears like Orgin is able to directly import Gamry DTA files. Please see here: www.originlab.com/FileExchange/details.aspx?fid=391 This would eliminate the needs to Export from our Analyst software, as Orgin can directly open the DTA files. If you need support with this process we would recommend reaching out to Orgin directly, as they developed this import tool.
@@gamryinstruments Hello. How I can copy my fitting curve for EIS spectrum? In Echem Analyst 1 it was possible, now only the experimental curve is copying.
Hello. Thank you for the video. Can we make a Tafel fit combining two polarization curves? One for cathodic, and another for anodic potentials. Thank you for the answer in advance.
Yes, you are able to do this in our Analyst software. You can overlay the two files, one for the anodic and one for the cathodic. To calculate the constants you can perform an "E log I" fit, which is a Tafel fit performed on either the anodic or cathodic half of the curve. If you need any assistance performing this, please reach out to our Technical Support Engineering team at techsupport@gamry.com. We are happy to help.
@@gamryinstruments Thank you for the answer. One more question: Is it possible to correct my data (current or impedance) with surface area of the sample?
@@dmitrykurchavov9744 Yes, this is possible. Once you open a data file, you can go to Options. In here you will see a section for "Units for Current". You can select between Current (non-normalized) and Current Density (area normalized). Same applies for impedance data. If you need any assistance, please do not hesitate to reach out to our Technical Support team. www.gamry.com/contact-us/speak-to-an-electrochemist-2/
Hello Enrique and thank you for your question. I admit this is a much too broad of a question, so I suggest you contact our Technical Support team. You can either email Support at techsupport@gamry.com or completing the Contact Support form on our website at - www.gamry.com/support-2/contact-technical-support. Please be more specific with your questioning so we can insure you receive the correct information, Thank you again for your support of Gamry.
Our DTA files are simple tab-delimited text files. If a data set matches this and our other general formatting, it can be opened in Echem Analyst 2. If you reach out to our Technical Support team at techsupport@gamry.com, one of our engineers can provide addition details on implementing this.
You can find our Interface 1000 Setup and Quick Start Guide here: www.gamry.com/assets/Uploads/USB-Pstat-Install-QSG2017.pdf www.gamry.com/assets/Uploads/USB-Pstat1000-Calibration-QSG2016.pdf If you need assistance on setting up a specific experiment, please contact our Technical Support engineers at techsupport@gamry.com
In many situations, EIS is run without DC polarization. Meaning, the DC polarization is set to 0V vs Eoc (Open Circuit Potential). This is so the spectra can be acquired at steady-state. There can be exceptions in cases of high impedance coatings, driving a fuel cell, etc, but these are less common. If you email techsupport@gamry.com, one of our engineers can discuss how to set a DC potential that is appropriate for your application.
Good morning sir, could please explain a bit, how the temperature is effect the battery, like summer and winter seasons, is it a chance in winter seasons the battery discharge fast due to the low temperature?. Kindly explain
Temperature can certainly impact the charge and discharge characteristics of a battery. The amount temperature impacts the characteristics would be dependent on many factors, including the chemistry of the battery. Many customers will run their CCD curves in an environmental chamber in order to determine the impacts of temperature on their specific cells.
Thank you very much for such a great and helpful presentation. We are looking for more videos about the battery mechanism, means more inside the battery..
The experiment you described is easily automated in our Sequence Wizard. Please email techsupport@gamry.com, and one of our Technical Support Engineers can assist with setting this up for you.
CCD is generally performed to determine how a cell's performance changes as a function of cycle number. Gamry's CCD contains many analyses that are performed automatically, and would not be done for other DC techniques. It also contains additional Stop At conditions that better meet the needs of those in the energy field. At its most basic CCD is a cyclic galvanostatic experiment, but there are additional features and analysis that are pertinent to the market. If you have additional questions please reach out to techsupport@gamry.com, and one of our Technical Support Engineers would be happy to help further.
@@gamryinstruments 19:45 the Coulomnic efficiency as described here, can I know how is it calculated for the charging phase and discharging phase? what I want to know is since for more accurate soc determination addition of Col efficiency adds account for more precision in readings for SOC estimate so for chg and dcg states should we use same eff value ( in your case its 98% or 0.98) , is this going ti be valid for both cases?
Hi @Gamry Instruments, I am currently evaluating susceptibility of material to corrosion from Tafel plot. I'd like to ask what is the most appropriate range of current values used to evaluation by your Tafel Fit routine. Evaluation will be done by more people so I am looking for an objective way to do the evaluation. Is there any standard (ISO, ASTM,...) for this purpose? Thanks.
Due to the wide variety of materials and electrolytes used, there is no generic standard or "rule" to follow when selecting a region. The region selected should encompass the linear Tafel region, but there are no guidelines beyond this. If you commonly test the same materials and have a large data set, you can likely define a range of values more specific to your system. If you email your data set(s) to techsupport@gamry.com, one of our Technical Support Engineers can provide feedback on the selected region.
Hello, I am using gamry Reference 600 and working on GCD in a three-electrode system but am not able to perform it because the instrument gives the error of PWR800. Can you kindly help me solve this issue? thanks
We saw your technical support request this morning, and are actively working to resolve the issue. Could you email a screenshot of the error message to techsupport@gamry.com?
Hi thank you for the video. I actually did measurements with and without inhibitor. And with inhibitor the corrosion rate gets smaller an my anodic slope gets steeper. But all of my tafel constants (ba= 50 mV/dec; bc= 470 mV/dec) stay more or less the same because it's the only way to get a fit where the linear part of cathodic and anodic branch intersect with Ecorr. So my question is what does it mean, when the anodic branch changes and what physical meaning does the tafel constants have? Thanks
There is not a simple or straight forward answer to this question. There are many variables that can cause the tafel constants and the anodic slope to shift. When the slope of the anodic portion changes, we can say that the kinetics of the M -> (M+) + e- half reaction has changed. The cause of this is varied, and system dependent. If you email your data files to techsupport@gamry.com, we can perhaps provide more specific details, or provide resources on the topic.
Hello, I watched a demo of corrosion calculation published on this youtube channel, it was called "Calculation corrosion rates with LPR&EIS" I wanted to ask what is the difference between 3 electrode potentiostat and 4 electrodes one. I believe In that video the person was using 4 electrode potentiostat and the 4th electrode was a " sense cable/electroode"
Yes, in a 4 electrode setup there will be two sense electrodes. This eliminates the impedance of the electrodes from the spectra, and only measures the impedance between the sense electrodes. We have an app note that covers this is more detail here: www.gamry.com/application-notes/instrumentation/two-three-four-electrode-experiments/ All of our instruments can perform 2, 3, and 4 electrode experiments. If you have additional questions, please contact our technical support team at techsupport@gamry.com
Thank you for your inquiry. Ru and Rp is the model represent the solution resistance and polarization resistance. If you have any additional questions, please contact us at techsupport@gamry.com or by completing this contact form on our web site: www.gamry.com/support/contact-technical-support/
Hello, if I need to measure a corrosion of the coating on the stainless steel electrode in the absence of any solvent. How should I setup the experiment? Thank you
You will need an electrolyte containing solution in order to conduct corrosion experiments. The setup described here would be a good place to start: www.gamry.com/application-notes/corrosion-coatings/corrosion-techniques-polarization-resistance/ If you have additional questions, please contact us at techsupport@gamry.com”
hello. How can i compare the result of corrosion between Gamry device and normal humidity tester ? Is there any international standart that contains acceptance criteria ? How can I say "test is ok" after i finish the test. We have a gamry device but we dont know how we evaluate the result. For example when we have a new metal sheet like galvanised, we perform the test with gamry device but we dont know what is the acceptance criteria. Can you pls help us ?
We have the follow article which describes how to run and analyze a corrosion test using a Gamry potentiostat:www.gamry.com/application-notes/corrosion-coatings/corrosion-techniques-polarization-resistance/ There are also numerous ASTM standards for corrosion measurements. These include G5-94, G59-97, and G61-86. If you have additional questions, please contact us at techsupport@gamry.com
Increasing the "Init. Delay" parameter time will help ensure your sample is stable before the Tafel test begins. This can help reduce the difference between Ecorr and Eoc. If you email your data file to techsupport@gamry.com, one of our engineers may be able to provide additional suggestions
@@gamryinstrumentsOk, thank you sir I will see to that and sir one more thing, whenever this comment shows up, does this mean that the graph obtained is wrong ?
When I plot the THD vs frequency, I have the possibility to choose between THD for the potential and THD for the current. Which one should I look at? Does this depend on what type of EIS I'm running (potentiostatic or galvanostaric)?
You want to look at the THD on the measured signal. So if you are running Potentiostatic EIS, you will want to look at Current THD. Similarly, if you are running Galvanostatic EIS, you will want to look at Potential THD. If you have additional questions, please reach out to our Technical Support team at techsupport@gamry.com. One of our engineers would be happy to provide additional assistance.
Once Icorr, Ba, and Bc have been calculated by Tafel analysis, Faraday's law can be used to relate current to mass (and mass loss). The mass loss can then be converted to a corrosion rate. We offer a application note that shows the details of this calculation: www.gamry.com/application-notes/corrosion-coatings/basics-of-electrochemical-corrosion-measurements/
Thank you for your interest. All videos we currently have available can be found on our web site : www.gamry.com/resources/gamry-product-videos/ There are also Quick Start Guides available for all of our instruments: www.gamry.com/support/documentation-downloads/ --
LPR would not work well for systems with pitting corrosion. I would review this paper for information on measuring pitting corrosion, G. S. Frankel , Pitting Corrosion of Metals, J. Electrochem. Soc., Vol. 145, No. 6, 2186-2198 (1998)
The Goodness of Fit is a Chi Squared value. There is no exact value that determines if the model is good or bad. Ideally, it will be between 10^-3 and 10^-6. However, the margin of error for each element is a better indicator of model quality than Goodness of Fit is. If you have additional questions, please contact our support team at techsupport@gamry.com
You can use the Copy to Clipboard function, located in the upper left of the screen, to copy the data shown on-screen. This function will copy the numerical fit data to clipboard. It can then be pasted into NotePad, Excel, etc. If you have additional questions, please email techsupport@gamry.com
@@gamryinstruments When I did that it only gave me the data from the experiment, and not the data from the fit. Is there a way to get just this fittet data?
