Sulfonamide corrosion inhibitors

US10494722B1 · kind B1 · utility

Assignee

• KING SAUD UNIVERSITY · SA

Inventors

• Nabil Ahmed Qassim Al-Zeqri · Riyadh, SA
• Isra Abd Alrhman Aboasbah · Nablus, PS
• Ali Mohammed Alsalme · Riyadh, SA
• Mohammed Suleiman Shtaya · Nablus, PS
• Iyad Saadeddin · باردو, TN
• Abdelkader Zarrouk · Oujda, MA
• Ismail Khalil Warad · Nablus, PS

Key dates

• Filing date: Apr 22, 2019
• Grant date: Dec 3, 2019
• Expiry date: Apr 22, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/06
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The sulfonamide corrosion inhibitors are compounds of formula A or formula B, as follows: A method of synthesizing the sulfonamide corrosion inhibitors includes functionalizing a polyamine precursor with a sulfonyl chloride derivative by dehydrochlorination. The polyamine precursor may be bis(3-aminopropyl)amine and the sulfonyl chloride derivative may be methanesulfonyl chloride. The sulfonamide corrosion inhibitors may be applied alone or in any combination as corrosion inhibitors of a metal and are shown to be effective inhibitors of corrosion of iron or iron alloys in acidic conditions.