{'fraction_non_alphanumeric': 0.028051554207733132, 'fraction_numerical': 0.017437452615617893, 'mean_word_length': 4.665236051502146, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Using data of weight tests and impedance spectroscopy to evaluate the protective effectiveness of zinc-rich oil coatings in corrosion of carbon steel

Studies have been carried out in a 3% aqueous solution of NaCl, acidified in some cases to pH 3 or 4. The protective efficacy of zinc-rich coatings based on waste motor oil has also been studied in a thermal moisture chamber and natural conditions. Partial rates of oxidation of zinc from the coating and iron are estimated on the base of chemical analysis of saline solution for Zn 2+ and Fe 2+ + Fe 3+ ions. The protective effect of zinc as a function of its concentration in the coating, which varies with time as a result of its anodic dissolution, is estimated. The effect of oil-zinc-containing (40, 50 and 60 wt.% Zn) coatings on the charge transfer resistance in partial electrode reactions occurring during steel corrosion has been investigated by impedance spectroscopy. It is shown that the protective effect ( Z , %) of the oil compositions reaches 88, 86 and 90% for corrosion tests in the chloride salt solution, thermal moisture chamber and under natural conditions, respectively. However, in 3% NaCl solution it sharply decreases after a zinc concentration decrease in the oil film to 16–20%. The charge transfer resistance in the cathodic reaction ( R