申请人:Helmholtz-Zentrum Geesthacht Zentrum für Material-und Küstenforschung GmbH
公开号:US10590343B2
公开(公告)日:2020-03-17
The present invention relates to novel corrosion inhibitor compositions for magnesium or magnesium alloys and to a process for inhibiting the corrosion of such metals using such compositions. The corrosion inhibitor composition for magnesium or magnesium alloys comprises at least one corrosion inhibiting compound which is capable of forming a complex with at least one of Fe(II), Fe(III), Cu(I), Cu(II) and Ni(II) ions, where the complex with at least one of Fe(II), Fe(III), Cu(I), Cu(II) and Ni(II) ions has a stability constant in aqueous solution at room temperature (about 21° C.) log K of greater than or equal to 3.5 wherein the corrosion inhibiting compound is selected from the group of pyridinedicarboxylic acids, and their salts or esters thereof.
本发明涉及用于镁或镁合金的新型缓蚀剂组合物,以及使用此类组合物抑制此类金属腐蚀的工艺。用于镁或镁合金的缓蚀剂组合物包括至少一种能与 Fe(II)、Fe(III)、Cu(I)、Cu(II)和 Ni(II)离子中的至少一种形成络合物的缓蚀化合物,其中与 Fe(II)、Fe(III)、Cu(I)、Cu(II)和 Ni(II)离子中的至少一种形成的络合物在室温(约 21°C.其中缓蚀化合物选自吡啶二羧酸及其盐或酯类。