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    • 3. 发明授权
    • Method for protecting metal surfaces against corrosion in liquid or gaseous media
    • 保护金属表面免受液体或气体介质腐蚀的方法
    • US06261346B1
    • 2001-07-17
    • US09319144
    • 1999-07-29
    • Wolfgang BreuerRobert SchuetzGuenther UphuesClaus-Peter HeroldRafael Pi
    • Wolfgang BreuerRobert SchuetzGuenther UphuesClaus-Peter HeroldRafael Pi
    • C23F1114
    • C23F11/141C09K8/54C23F11/142C23F11/145
    • A process useful for protecting metal surfaces against corrosion in is presented involving: (a) forming a corrosion inhibitor having a compound corresponding to formula (I): where R1, R2 and R3 independently of one another represent an alkyl or hydroxyalkyl group containing 1 to 4 carbon atoms, an aryl or alkylaryl group or a group corresponding to formula (II): A− is an anion, n is the number 2 or 3, p is a number of 1 to 3 and R5 is an alkyl or alkenyl group containing 7 to 23 carbon atoms and 0, 1, 2 or 3 double bonds, and R4 is a group corresponding to formula (II) or (III): where R1, R2 and R3 are as defined above and Z is a group —(CH2)m— or a group corresponding to formula (IV):  m is an integer of 1 to 6, X is a group NH or an oxygen atom and D is a dimer fatty acid residue containing on average 36 to 54 carbon atoms; (b) combining the corrosion inhibitor with liquid aqueous, liquid non-aqueous or gaseous media; and (c) contacting the corrosion inhibitor with metal. The corrosion inhibitor used in the is biodegradable and shows low aquatic toxicity.
    • 提出了一种用于保护金属表面免受腐蚀的方法,涉及:(a)形成具有对应于式(I)的化合物的腐蚀抑制剂:其中R 1,R 2和R 3彼此独立地表示含有1至 4个碳原子,芳基或烷基芳基或对应于式(II)的基团:A-是阴离子,n是数2或3,p是1至3的数,R 5是含有 7至23个碳原子和0,1,2或3个双键,R4是与式(II)或(III)相应的基团:其中R1,R2和R3如上定义,Z是基团 - (CH2 )m-或对应于式(IV)的基团:m是1至6的整数,X是NH或氧原子,D是含有平均36至54个碳原子的二聚脂肪酸残基; (b)将腐蚀抑制剂与液体水性,液体非水性或气态介质结合; 和(c)使腐蚀抑制剂与金属接触。 所用的腐蚀抑制剂是可生物降解的,水生毒性低。