2 results about "Pentetic acid" patented technology

The application provides a Sn58Bi low-temperature soldering tin ball surface treatment agent and a preparation method thereof, and relates to the technical field of metal surface treatment.The Sn58Bi low-temperature soldering tin ball surface treatment agent is composed of tin ball activators (diethylenetriamine pentaacetic acid and ethylenediamine tetraacetic acid), a film forming agent, a surfactant, a dispersing agent, an antioxidant, a defoaming agent, a stabilizer, a preservative, deionized water and the like.The surface treatment agent can effectively improve the soldering reliability of the Sn58Bi soldering tin ball, prolong the service life of the soldering tin ball, has good oxidation resistance and corrosion resistance under the premise of not affecting the soldering performance, and is suitable for various complex working environments.Meanwhile, the preparation process of the Sn58Bi low-temperature soldering tin ball surface treatment agent is simple, convenient to use, has good physical stability after film forming, can avoid oxidation and the invasion of pollutants during long-term storage of the soldering tin ball, and improves the quality of the soldering tin ball.

The invention provides a liquid compound fertilizer for promoting crop growth as well as a preparation method and application thereof, and belongs to the technical field of agricultural fertilizers. The liquid compound fertilizer comprises an auxiliary agent, wherein the auxiliary agent is prepared from the following components in parts by weight: 0.2 to 0.8 part of nano silicon, 1 to 3 parts of polyacrylamide, 0.3 to 0.8 part of xanthan gum, 0.5 to 1.5 parts of charcoal, 0.05 to 0.15 part of cobalt nitrate and 0.1 to 0.3 part of cerium diethylene triamine pentaacetate. The liquid compound fertilizer disclosed by the invention has the effects of remarkably improving the plant height, stem diameter, leaf length, leaf width and chlorophyll content of plants, and further can promote the growth of crops. The liquid compound fertilizer can effectively inhibit fusarium in soil, can effectively reduce the morbidity and disease index of soil-borne diseases caused by fusarium, and provides more solutions for prevention and treatment of soil-borne diseases in agricultural production.