We study the combined action of reagents and ultrasound on corrosion and scaling under the conditions of operation of water-heating equipment at a temperature of 95 ± 2°С and under atmospheric pressure. The efficiency of a known agent (oxyethylidene diphosphonic acid) and a “green” inhibitor based on the extract of rapeseed oil meal is found in high-hardness water both under the conditions of their individual action and in combination with ultrasonic irradiation of the medium in the subcavitation mode. The scaling (according to the mass increments) and corrosion (by the method of polarization resistance) rate are determined on the same samples. The functional time dependences of the specific scaling and corrosion rates are obtained under the conditions of reagent, ultrasonic, and combined treatment of water. It is shown that ultrasound exerts a negative influence on the antiscale properties of the investigated reagents by decreasing the efficiency of action of the antiscalant. A protective anticorrosion film is formed on the steel surface with time, as follows from the behavior of the corrosion rate, which sharply decreases in the initial period of the tests and then stabilizes on a level of 0.02 mm/yr. It is demonstrated that the complex influence of antiscalants and ultrasound in certain modes of treatment of the medium makes it possible to optimize the formation and preservation of a phase microlayer with antirust properties, which exerts almost no influence on the heat exchange between the metal surface and the heat carrier.

中文翻译：

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超声波作用下钢的腐蚀和结垢抑制剂保护

我们研究了在 95 ± 2°С 温度和大气压下的水加热设备运行条件下，试剂和超声波对腐蚀和结垢的联合作用。已知试剂（氧亚乙基二膦酸）和基于菜籽油粕提取物的“绿色”抑制剂的效率在高硬度水中在它们各自作用的条件下以及与介质的超声辐照相结合的条件下被发现。亚空化模式。缩放（根据质量增量）和腐蚀（通过极化电阻的方法）速率是在相同的样品上确​​定的。在试剂、超声波和水的联合处理条件下，获得了特定结垢和腐蚀速率的函数时间依赖性。结果表明，超声波通过降低阻垢剂的作用效率对所研究试剂的阻垢性能产生负面影响。随着时间的推移，钢表面会形成一层保护性防腐膜，从腐蚀速率的行为来看，腐蚀速率在试验初期急剧下降，然后稳定在 0.02 毫米/年的水平。结果表明，在介质的某些处理模式中，阻垢剂和超声波的复杂影响可以优化具有防锈性能的相微层的形成和保存，这对金属表面和金属表面之间的热交换几乎没有影响。热载体。