A rare earth passivation solution based on nano-attapulgite and its preparation and passivation process

Abstract

The invention provides rare earth passivation liquid based on nanometer attapulgite and preparation and passivation processes thereof. The rare earth passivation liquid based on the nanometer attapulgite comprises rare earth coated natural bentonite, the nanometer attapulgite, a silane coupling agent, hydrogen peroxide, sulfuric acid, sodium nitrate and copper sulfate. The preparation method comprises the following steps: the silane coupling agent is added in ethanol water solution for uniform stirring, the nanometer attapulgite is added for uniform stirring to form nanometer attapulgite solution; the natural bentonite and rare earth elements are added in distilled water for magnetic stirring dissolution at room temperature to form rare earth coated bentonite solution; and after the two types of solution are mixed, aluminum silicate and auxiliaries are added for uniform mixing to form the rare earth passivation liquid based on the nanometer attapulgite. The silane coupling agent is used for modifying the rare earth elements, the nanometer attapulgite and the natural bentonite, and is combined with silicate; the prepared passivation liquid is stable and uniform; the passivation process is simple; the passivation effect is good; the use level of rare earth is reduced; and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of passivation liquid materials, and in particular relates to a rare earth passivation liquid based on nano-attapulgite and its preparation and passivation process. Background technique [0002] Passivation treatment is a kind of chemical conversion film technology, which changes the surface state of the metal through chemical or electrochemical means, so that the electrode potential of the metal jumps greatly to the positive direction, and becomes a corrosion-resistant passive state, thus showing Performance of anti-corrosion candles. [0003] The traditional hexavalent complex salt passivation solution is widely used because of its stable performance, low cost, convenient use, good corrosion resistance, and simple passivation process, but the hexavalent complex is highly toxic and can cause cancer, which is harmful to human body and The environment is very harmful. In recent years, with the improvement of...

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Problems solved by technology

It can be seen from the above prior art that by combining rare earth cerium salts with other inorganic substances, the amount of rare earths in the rare earth inorganic passivation process can be reduced without reducing the passivation effect, but the cost of the passivation solution is still up to Not to the extent that it can be widely used, so a further step is needed to find an alternative process