“…For example, the efficiency of ZnHEDP was studied using corrosion indicators, and for comparison, that of known inhibitors: IOMS-1, HEDP itself, PAPh-13A (NTP aqueous solution, methyliminodiphosphonic acid (MIDP), and polyaminopolymethylphosphonates), as corrosion inhibitors for internal pipe surfaces in a hot water supply system [9]. These OPs were found to inhibit corrosion in deaerated water, but their efficiency is much lower than that of ZnHEDP.…”