Muriatic Acid

Definition - What does Muriatic Acid mean?

Muriatic acid is a colorless, ultra-pungent solution consisting of hydrogen chloride in water. It is a very strong mineral and highly corrosive with numerous industrial uses.

It was historically produced with a common salt and vitriol, a kind of sulfuric acid.

Muriatic acid is also known as hydrochloric acid.

Corrosionpedia explains Muriatic Acid

Muriatic acid is a very reactive liquid and considered among the most hazardous chemicals. It is more accurately described as an industrial-strength solution composed of hydrogen chloride gas that is dissolved in liquids such as water.

It can damage almost anything, aside from certain types of plastics. It can easily damage skin, metal and clothing as well as most other surfaces. Furthermore, it releases an overpowering gas that can rapidly burn the internal linings of the human body such as in the lungs, nose and throat.

The most common uses of muriatic acid include:

  • Masonry cleaning
  • Masonry preparation for sealing and painting
  • Reduction of pH in pools
  • Mineral deposit removal

In spite of its many uses, it can have severe effects on paint. A surface that reacts to muriatic acid can become etched and rough. It also makes surfaces more alkaline, which hinders the proper adhesion of paint products and coatings. To solve this, acid washing is performed, resulting in a more suitable surface for coating.

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