Environmentally-friendly antirust oil for iron-based powder metallurgy parts and preparation method of antirust oil

Abstract

The invention belongs to the technical field of metal processing, and more particularly relates to environmentally-friendly antirust oil for iron-based powder metallurgy parts and a preparation methodof the antirust oil. The environmentally-friendly antirust oil for the iron-based powder metallurgy parts comprises the following components, in parts by weight: 60-90 parts of base oil, 3-20 parts of a barium-free sulfonate, 0.1-20 parts of a rust inhibitor, 0.5-10 parts of an auxiliary agent and 0.1-1 part of an antioxidant. According to the environmentally-friendly antirust oil for the iron-based powder metallurgy parts provided by the invention, the base oil, the barium-free sulfonate, the rust inhibitor, the auxiliary agent and the antioxidant are adopted for compounding to provide highantirust performance, different from a traditional antirust method of powder metallurgy which needs high-temperature cooking, the product provided by the invention is immersed at room temperature andcan be quickly penetrated into metal gaps to discharge moisture in pores and the metal surface out, after draining is performed, an oil film is thin and non-sticky, has good salt spray resistance andmeets the antirust requirements for sea export of products, and the product does not contain heavy metals such as barium and is safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of metal processing. More specifically, the invention relates to an environment-friendly antirust oil for iron-based powder metallurgy parts and a preparation method thereof. Background technique [0002] Metal corrosion has been a problem that has plagued people for a long time. The loss caused by metal corrosion is extremely heavy. According to the statistics of the American Institute of Metals, the annual economic loss caused by metal corrosion in the world accounts for 4% of the total production value, and the scrap metal due to corrosion accounts for 4% of the total output. 30% of my country's annual economic losses due to metal corrosion amounted to more than 300 billion yuan. In order to avoid corrosion and reduce losses, people have adopted various protection methods, among which, using various anti-rust oils to protect metal workpieces is one of the most common protection methods at present. [0003...

AI Technical Summary

Problems solved by technology

[0004] However, for iron-based powder metallurgy parts, they are all made by sintering metal powder. There must be many pores inside the product, and the water in the pores is difficult to discharge, and rust is more likely to occur. However, the existing anti-rust oil and water replacement The ability is poor, it is not easy to immerse into the gap of the metal substrate, and it cannot prevent the corrosion of the metal substrate by the pore water, and almost 90% of the existing antirust oils are based on oil-soluble barium sulfonate. Oil-soluble barium salt itself is non-toxic, but if it is scattered in the natural environment, it will decompose into toxic soluble barium salt, which is a serious hazard to the environment and human body

Therefore, the comprehensive antirust performance of the existing antirust oil is poor, and it is difficult to guarantee the working performance and service life of the equipment

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