Corrosion inhibitor for 7075 aluminum alloy, micro-emulsification processing stock solution and preparation method thereof

Abstract

The invention belongs to the technical field of metal processing fluid, aims at solving the problem that the processing fluid for 7075 aluminum alloy is excessively high in phosphorus content, and discloses a corrosion inhibitor for the 7075 aluminum alloy. The corrosion inhibitor for the 7075 aluminum alloy is prepared from 0.05 to 0.3 part by volume of phosphorus-containing corrosion inhibitor and 0.1 to 1.5 parts by volume of phosphorus-free corrosion inhibitor; the weight percentage of fatty alcohol-polyoxyethylene ether phosphate in the phosphorus-containing corrosion inhibitor is greaterthan or equal to 95 percent; the phosphorus-free corrosion inhibitor is a water-soluble imidazoline corrosion inhibitor or polyepoxysuccinic acid corrosion inhibitor; and the weight percentage of imidazoline cationic compound in the water-soluble imidazoline corrosion inhibitor is greater than or equal to 20 percent, and the weight percentage of polyepoxy succinate in the polyepoxysuccinic acid corrosion inhibitor is greater than or equal to 40 percent. The water-soluble imidazoline corrosion inhibitor or polyepoxysuccinic acid with no corrosion inhibition effect or poor corrosion inhibitioneffect for 7075 aluminum alloy is compounded with fatty alcohol-polyoxyethylene ether phosphate, so that the same and even better corrosion inhibition effect can be achieved by utilizing less phosphorus compound, and the phosphorus emission amount can be reduced.

Description

Technical field [0001] The invention belongs to the technical field of metal working fluids, and specifically relates to a corrosion inhibitor for 7075 aluminum alloy, a microemulsion processing stock solution for 7075 aluminum alloy and a preparation method thereof. Background technique [0002] The metal cutting process is the process of using a machine tool to grind or cut the excess metal on the device with an abrasive tool to obtain a workpiece that meets the process requirements. During the machining process, the frictional heat between the abrasive or tool and the workpiece causes the local high temperature of the machine tool. This local high temperature will cause changes in the physical and mechanical properties of the metal materials, and the changes in the properties of the materials will in turn affect the machining process. In itself, it is easy to produce consequences such as severe tool wear, reduced surface machining accuracy of the workpiece, and poor surface qu...

AI Technical Summary

Problems solved by technology

However, the phosphorus content in the processing fluid system using phosphorus-based corrosion inhibitors alone is relatively high, and the volume fraction of phosphorus-containing compounds in the processing stock solution reaches 1.8%-2.5%. The dilution of the original solution will discharge about 1 kg of phosphorus-containing compounds, resulting in eutrophication of the water body and increasing the burden on the environment, which is not in line with the concept of sustainable development of the green economy.

Images