Hi,

I can only imagine that one wants to develop and test a pickling inhibitor or generally find an inhibitor for strongly acidic media. A further motivation could be that in 1 M HCl the metal loss is comparatively high in a short time and that you can gravimetrically very quickly determine an inhibitor effect by means of coupons.

Best regards,

Andreas

Dear Dr. Bertrand Ngoune,

It is important to study structural material exposed to outdoor conditions especially in acidic media where corrosion is considerably more severe. Because of the general aggressiveness of acid solutions, inhibitors are commonly used to reduce the corrosive attack on metallic materials.

Furthermore, in the metallurgical industry, hydrochloric and sulfuric acids are widely used in various processes such as pickling of metals to remove scale, deactivation of equipment in atomic power establishments, chemical or electrochemical processes in oil refinery, rocket fuel components in rocket technology, etc.. Also in this case, inhibitors show a pivot role to have protective action against the corrosion of different metals and alloys.

Best regards, Pierluigi Traverso

It is not necessary to study in this concentration, once i was studying a paper in which they ran the whole experiment in 0.1 M since the substrate was sensetive. After all because most of the studies are in this concentration, it is better to have a comparison.

This is the minimum normality at which the pH of the solution is zero (full acidic solution) and at lower concentration (lower normality) the pH increase until reaching a value of 7 at normality of 0.0000001

So unit normality (1N) is the less hazards and low cost effective concentration than the higher concentration(higher normality) at the same zero pH value.

Best regards

https://www.researchgate.net/post/why_using_1_M_HCl_in_corrosion_why_this_concentration