Cleaning and tinning process for steel shell

A steel shell and process technology, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problems of complex cleaning and tinning process, low production efficiency, uneven quality of steel shell, etc., to achieve The effects of eliminating repetitive procedures, improving work efficiency, and simple process methods

Inactive Publication Date: 2016-06-22
CHONGQING CITY BANAN DISTRICT YONGXING MACHINERY FACTORY
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  • Abstract
  • Description
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Problems solved by technology

[0002] At present, the cleaning and tinning process of the steel shell is relatively complicated, and there is no unified specification and standard, resulting in uneven quality of the produced steel shell, and many repeated processes also make the production efficiency low and inc

Method used

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Example Embodiment

[0015] The technical solution disclosed in the present invention is a process for cleaning and tinning steel shells, which is characterized in that it includes the following steps: 1) Cleaning the steel shells and degreasing: the scale and dirt on the steel shells can be cleaned with sandpaper, wire brushes or Remove it by sandblasting. When the steel shell has oil stains, you can boil the steel shell in hot alkaline water at 80-100°C for 10-12 minutes, and then put it in clean water at 80-100°C for 4-5 minutes to remove it. Alkali, then rinse in cold water and dry, the composition of alkaline water is 10% NaOH aqueous solution or 10% ~ 30% NaCO3 aqueous solution;

[0016] 2) Check and correct the steel shell: check whether there are oxides on the inner surface of the steel shell, and the oxide-free surface should be silver-gray. If there are golden or brown oxidation spots, it should be pickled with 30% hydrochloric acid aqueous solution, or polished with a wire brush;

[00...

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Abstract

The invention discloses a cleaning and tinning process for a steel shell. The process comprises the following steps: 1) cleaning the steel shell and removing grease; 2) examining and correcting the steel shell; 3) removing oil stains again; and 4) carrying out tinning: (1) preparation before tinning: a, dissolving a mixture of zinc chloride and ammonium chloride mixed according to ratio of 2: 1 in hot water with a temperature of 60 to 70 DEG C so as to prepare a saturated solution, and b, preparing a saturated solution from 32% of zinc chloride, 2.5% of ammonium chloride, 4% of tin chloride and water being the balance; (2) heating of a tinning pot, wherein the steel shell should be preheated at a temperature of 270 to 300 DEG C before tinning, and if preheating temperature is too high, an oxide layer occurs on the surface of the steel shell, bonding is hard to realize during tinning, and even though bonding is barely succeeded, the bonding is not firm; and (3) tinning. The process provided by the invention is simple, omits a great number of repeated procedures and has improved work efficiency.

Description

technical field [0001] The invention relates to a process of cleaning and tinning a steel shell. Background technique [0002] At present, the cleaning and tinning process of the steel shell is relatively complicated, and there is no unified specification and standard, resulting in uneven quality of the produced steel shell, and many repeated processes also make the production efficiency low and increase the labor burden of the workers. Make the market competitiveness of the product is not high. For some operators who have just entered the industry, there is no clear method and process, resulting in frequent mistakes and omissions during operation, and may even cause serious consequences. Contents of the invention [0003] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a steel shell cleaning and tinning process, which is simple, eliminates many repetitive processes, and improves work effic...

Claims

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Application Information

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IPC IPC(8): C23C2/08C23C2/02C23C2/34C23G1/19
Inventor 彭波
Owner CHONGQING CITY BANAN DISTRICT YONGXING MACHINERY FACTORY
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