King Saud University

Abdullah Mohammed Al-Mayouf

Mahmood M S Abdullah

Hamad Zaid Alkhathlan

Merajuddin Khan

Matar Naif Al-Shalwi

The steel panel with an integrated corrosion sensor is a steel panel having an integrated sensor for monitoring dissolution of a magnetite layer during acid cleaning of the steel panel. The steel panel has an opening formed therethrough, and a hollow insulator is secured to the steel panel within the opening. The hollow insulator is formed from an electrical insulation material and electrically isolates the steel panel from a steel core, which is mounted within the hollow insulator. A reference electrode is positioned near the steel panel. A voltmeter is electrically connected between the reference electrode and a first surface of the steel core. An opposed second surface of the steel core has a layer of magnetite formed thereon. An alarm is in electrical communication with the voltmeter, such that the alarm generates an alarm signal when the voltmeter detects a corrosion potential at a preset threshold potential.

Steel panel with an integrated corrosion sensor

Extracts offlowers are shown to exhibit anticorrosive activity when used with mild steel in acidic media. A process is shown for obtaining such anticorrosive extracts from the flowers of. In particular, certain methanolic, aqueous methanolic and water extracts, as well as ethyl acetate and n-butanol fractions, offlowers are shown to demonstrate particular anticorrosive activity when used with mild steel in acidic media. An isolated flavonoid compound fromflowers, designated as apigenin-7-O-&#x3b2;-D-glucoside, is particularly useful for anticorrosive activity when used with mild steel in acidic media.

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Riyadh, Saudi Arabia

Abdullah Mohammed Al-Mayouf