Ammonium salts of O,O’-dialkyldithiophosphoric acids: Effective inhibitors for carbon dioxide corrosion of mild steel on the basis of red phosphorus

GRAPHICAL ABSTRACT

ABSTRACT

Reaction of red phosphorus with elemental sulfur, alcohols and amines results in formation of ammonium salts of O,O'-dialkyl dithiophosphoric acids. Microwave irradiation accelerates the reaction studied. Triethylammonium salt of O,O'-diisooctyl dithiophosphoric acid possesses high anticorrosion activity towards mild steel.

KEYWORDS:

• Red phosphorus
• sulfur
• amines
• ammonium dithiophosphates
• microwave

Funding

The study was performed with financial support of the Russian Foundation for Basic Researches (Grant No. 15-03-01394-a).