Pickling FAQ: Acid Inhibitor Activol® 1803

Acid Regeneration Systems

My company has a fluid-bed acid regeneration system. I’m curious what happens to the Activol® and Hamico® when it goes through the system?

The combustion products of Activol® 1803 are carbon dioxide, carbon monoxide, sulfur oxides (very small amount), nitrogen oxides, and phosphorous oxides (very small amount).  The ingredients combust between 430-525 deg C. The only compound that could recombine with water would be phosphorous pentoxide, which could recombine to form a minute amount of phosphoric acid. The other gases would not recombine with water.

Hamico® 8906-WT would combust to carbon monoxide, carbon dioxide, and phosphorous oxides, again at temperatures ranging from 430-520 deg C.

What is meant by “Percent Efficiency”?

Percent efficiency is a comparison of relative protection to base metal afforded by an inhibitor.

Does Activol® 1803 slow the rate of descaling in the pickler?

 No, Activol® 1803 will neither hinder nor improve the rate of descaling.

How does Activol® 1803 work?

Activol® 1803, a polar, organic substance, attaches to the base metal immediately upon removal of the scale.

How do I measure the amount of Activol® 1803 in the pickle bath?

Unfortunately, there is no easy method to test for concentration once the inhibitor is in the pickle line. A concentration can be derived by doing a weight loss study; should you want information on this method, contact your representative or contact us directly.

Where is the best place to make additions of acid inhibitor?

The answer to this question depends upon a plant’s unique configuration. Generally, it’s best to add Activol® 1803 to the acid storage tanks so that it’s pre-mixed by the time it is delivered to the working pickle line tanks. (Note: if commercial acid is being used, the concentration of Activol® 1803 can be measured by use of a test kit.) If addition to the acid storage tanks is not feasible, then the Activol® 1803 can be added to the last tank of a continuous pickler.