A production process of hot-dip galvanizing for fasteners

Abstract

A hot-dip galvanized production process for fasteners, including: chemical degreasing: in a degreasing tank equipped with an ultrasonic generating device, the degreasing agent and ultrasonic waves are used to act on the fasteners, the degreasing temperature is 20-40 degrees, and the degreasing time is 1min; first water washing; second water washing; pickling; third water washing; One-time galvanizing: immerse the fasteners in the large galvanizing pot, the galvanizing temperature is 440-460 degrees; drying channel: through the waste heat of the flue gas from the large galvanizing pot to the small galvanizing pot Preheating of the transfer channel; second galvanizing: immerse the fastener in a small galvanizing pot, the galvanizing temperature is 500-540 degrees; centrifugal; cooling; passivation. The galvanizing capacity design of this process is significantly improved compared with the single method galvanizing, the investment cost and operating cost are significantly reduced, the production efficiency is high, the galvanizing effect is good, and its zinc consumption and energy consumption are both low.

Description

technical field [0001] The invention relates to the technical field of fastener processing, in particular to a production process of hot-dip galvanizing for fasteners. Background technique [0002] In the prior art, in order to improve corrosion resistance and brightness, fasteners are generally treated by hot-dip galvanizing process, and the fasteners are immersed in molten zinc solution to obtain a metal covering layer. In recent years, with the rapid development of high-voltage power transmission, transportation, and communication, there are increasingly higher requirements for fastener protection. At the same time, the demand for hot-dip galvanized parts is also increasing. In the existing hot-dip galvanizing process, not only galvanized Zinc consumption is high, and energy consumption is also large, thus resulting in the current situation of high production costs. In addition, the current hot-dip galvanizing process has slow galvanizing efficiency and unsatisfactory ga...

AI Technical Summary

Problems solved by technology

In recent years, with the rapid development of high-voltage power transmission, transportation, and communication, there are increasingly higher requirements for fastener protection. At the same time, the demand for hot-dip galvanized parts is also increasing. In the existing hot-dip galvanizing process, not only galvanized The zinc consumption is high, and the energy consumption is also large, resulting in the current situation of high production costs

In addition, the current hot-dip galvanizing process has slow galvanizing efficiency and unsatisfactory galvanizing effect, which can no longer meet the needs of production

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