Corrosion inhibitor suitable for high-salt and high-chlorine working conditions and preparation method thereof

• Main Authors: ZENG WENGUANG, ZHAO HAIYANG, WEI XIAOJING, MA QINGJIE, ZHOU FENG, QIN FEI, YANG KANG, HU GUANGQIANG, LIU DONGMEI, XU YANYAN, SHI XIN, YING HAILING, ZHANG QIN, LIANG GENSHENG, LIU QINGSHAN
• Format: Patent
• Language: Chinese; English
• Published: 01.07.2022
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a corrosion inhibitor suitable for high-salt and high-chlorine working conditions. The corrosion inhibitor is prepared by compounding a component A and a component B according to a mass ratio of (1.5-2): (0.8-1.2), wherein the component A is prepared from mercaptobenzotriazole, dimethylformamide, sodium dodecyl benzene sulfonate, sodium borate and sodium nitrite; the component B is prepared from organic amine, sodium hydroxide and benzyl chloride; the density of the corrosion inhibitor is 1.0-1.3 g.cm <-3 >, the freezing point is less than-7 DEG C, and the pH value is 4-7. The corrosion inhibitor prepared by the method can effectively slow down corrosion of metal equipment under high-salt and high-chlorine working conditions, and is excellent in corrosion inhibition performance and low in cost. 本发明公开了一种适用于高盐、高氯工况下的缓蚀剂，该缓蚀剂由组分A和组分B按照1.5-2:0.8-1.2的质量比复配而成；其中组分A是由巯基苯丙三氮唑、二甲基甲酰胺、十二烷基苯磺酸钠、硼酸钠和亚硝酸钠制备而成；组分B是由有机胺、氢氧化钠和氯化苄制备而成；该缓蚀剂的密度为1.0-1.3g·cm-3，凝固点＜-7℃，pH值为4-7。通过上述方法制备得到的缓蚀剂能有效减缓高盐、高氯工况下金属设