Dear all scientist, good morning
MY STUDY:
When did corrosion inhibitor evaluation, I calculated re IE% and surface coverage. I have done in different temperature, RT, 45, 60 and 90oC. Rate increae with increase Temp and decrease with conce.
Q.1 When I calculate IE% of different temp. The IE% is increase as I increase temp. It should decrease. What is reason and where I did mistake in calculation.
I used formula for CR (mmy) = W x 87.6 / DAT
IE% = (1- CRinb/CR blk) x 100
As CR increase as temp increase, IE% should decrease, but my IE% is increasing from 30 to 45 to 60 to 90 oC.
Q.2 When I calculate Enthalpy (delta H ads) at different temperature, These value of Enthalpy adsorption is decrease in -ve value at different temp, it suppose to increase in -ve value.
What is reason adn what mistake I have done in calculation .
I will be highly thankful to you, please reply my question if possible.
Thanks
Tariq
Dear Dr. Saeed sb,
Perhaps your inhibitor is degrading under applied condition and the products are either possibly depositing or are forming a layer on the metal sample. Do some characterization of the electrolyte and metal surface before and after exposure. This may be the cause you are getting reversed behavior.
thanks
Dear Mohammed
I suggest doing some thermal stability test before using it as corrosion inhibitor in corrosive media. For example, for thermal stability test, you can put specific amount of corrosion inhibitor in oven under 110 C for 8 hours. then compare it with corrosion inhibitor which is dried at room temperature using IR . If your corrosion inhibitor degradated , you will see new peaks in IR diagram.
Regards
- Badges
- Science topic
- Similar topics
- Philosophy
- Philosophy Of Science
- Reasoning