Preparation method of corrosion-resistant cerium-containing Zn-Cu-Ti coating

A technology of zn-cu-ti and zn-cu-ti-ce is applied in the field of preparation of corrosion-resistant cerium-containing Zn-Cu-Ti coatings, which can solve the problems of unclear coating morphology and unclear influence.

Active Publication Date: 2022-04-08

JIANGSU CUMT DAZHENG SURFACE ENG TECH

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AI-Extracted Technical Summary

Problems solved by technology

However, the relevant research work has hardly been carried out, the morphology of hot-dip Zn-Cu-Ti-Ce co...

Abstract

The invention discloses a preparation method of a corrosion-resistant cerium-containing Zn-Cu-Ti coating, which comprises the following steps: (1) selecting high-quality sponge titanium and pure copper particles as raw materials, proportioning according to the ratio of 1: 1, and smelting by using a vacuum electric arc smelting furnace with an electromagnetic stirring condition to prepare a Cu-50Ti intermediate alloy; (2) weighing a pure zinc block and a pure cerium block according to a mass ratio of 50: 1, and smelting by using a common resistance furnace to prepare a zinc-cerium intermediate alloy; and (3) during hot dipping, the component Zn-0. 75Cu-0. 15Ti-Ce is firstly smelted, a Zn block is firstly melted, and the Cu-50Ti intermediate alloy and the zinc-cerium intermediate alloy are put into the molten Zn block. (4) before hot dipping, the Q235 surface is subjected to auxiliary plating treatment; and (5) the hot dipping temperature is set to be 700 DEG C, after dipping is conducted for 20-30 s, the steel plate is taken out, the pulling speed is 1.5 cm/s, and the steel plate is taken out and put into ultrapure water to be cooled. The method has the advantages that on one hand, the corrosion resistance of the hot-dip Zn-Cu-Ti alloy coating is further improved through the Zn-Cu-Ti coating containing Ce; and on the other hand, the problem of optimizing the hot dipping process of the cerium-containing Zn-Cu-Ti coating is determined.

Application Domain

Hot-dipping/immersion processes

Technology Topic

Corrosion resistantElectric arc +11

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Examples

Experimental program(5)

Example Embodiment

[0023] Example 1

[0024] Preparation method of corrosion resistant Zn-Cu-Ti coating, including the following steps:

[0025] (1) Preparation of high quality sponge titanium and pure copper particles as raw materials 1: 1, using a vacuum arcing furnace having electromagnetic stirring conditions, and prepared a Cu-50Ti intermediate alloy.

[0026] (2) The zn-10Cu and Zn-3CE intermediate alloy is prepared by the electrically resistant furnace, the melting temperature is 650 ° C, and the heat preservation time is not less than 5 h, and the heat is stirred .

[0027] (3) In pure Zn, Cu-50Ti, Zn-10Cu and Zn-3CE intermediate alloy is raw material, the Zn-0.75Cu-0.15Ti-0.1 Ce inhibiting liquid is prepared by the resistance furnace, and the Zn block is melted and selected. The temperature is about 650 ° C, and the Zn block is completely melted, and an intermediate alloy is added, and at 650 ° C for at least 4 h.

[0028] (4) Before performing hot dip coating, the surface of the Q235 is used to facilitate the coating group to become ZnCl. 2 300 g / l, NaCl 30g / L, NAF 5g / L, the helper plating temperature was 75 ° C, and the time was 30s; the last at 70 ° C was dried, and the time was 5 min. .

[0029] (5) Before immersing in the Zn-Cu-Ti-Ce bath, the scum and zinc gray on the surface of the zinc bath should be applied, and the temperature is placed at 700 ° C ± 5 ° C. When hot dip plating, the Q235 sample to be plated should be preheated, and the dipover 25s pulls out, pulled the speed of 1.5 cm / s, pulled out of the supermosite water.

Example Embodiment

[0030] Example 2

[0031] Preparation method of corrosion resistant Zn-Cu-Ti coating, including the following steps:

[0032] (1) Preparation of high quality sponge titanium and pure copper particles as raw materials 1: 1, using a vacuum arcing furnace having electromagnetic stirring conditions, and prepared a Cu-50Ti intermediate alloy.

[0033] (2) The zn-10Cu and Zn-3CE intermediate alloy is prepared by the electrically resistant furnace, the melting temperature is 650 ° C, and the heat preservation time is not less than 5 h, and the heat is stirred .

[0034] (3) Taking pure Zn, Cu-50Ti, Zn-10Cu and Zn-3CE, the Zn-0.75Cu-0.15Ti-0.2Ce dip is prepared by the resistance furnace, melting the Zn block, selective The temperature is about 650 ° C, and the Zn block is completely melted, and an intermediate alloy is added, and at 650 ° C for at least 4 h.

[0035] (4) Before performing hot dip coating, the surface of the Q235 is used to facilitate the coating group to become ZnCl. 2 300 g / l, NaCl 30g / L, NAF 5g / L, the helper plating temperature was 75 ° C, and the time was 30s; the last at 70 ° C was dried, and the time was 5 min. .

[0036] (5) Before immersing in the Zn-Cu-Ti-Ce bath, the scum and zinc gray on the surface of the zinc bath should be applied, and the temperature is placed at 700 ° C ± 5 ° C. When hot dip plating, the Q235 sample to be plated should be preheated, and the dipover 25s pulls out, pulled the speed of 1.5 cm / s, pulled out of the supermosite water.

Example Embodiment

[0037] Example 3

[0038] Preparation method of corrosion resistant Zn-Cu-Ti coating, including the following steps:

[0039] (1) Preparation of high quality sponge titanium and pure copper particles as raw materials 1: 1, using a vacuum arcing furnace having electromagnetic stirring conditions, and prepared a Cu-50Ti intermediate alloy.

[0040] (2) The zn-10Cu and Zn-3CE intermediate alloy is prepared by the electrically resistant furnace, the melting temperature is 650 ° C, and the heat preservation time is not less than 5 h, and the heat is stirred .

[0041](3) In pure Zn, Cu-50Ti, Zn-10Cu and Zn-3Ce intermediate alloy as raw materials, using a resistance furnace to prepare Zn-0.75cu-0.15Ti-0.3CE dipping liquid, melt the Zn block, select The temperature is about 650 ° C, and the Zn block is completely melted, and an intermediate alloy is added, and at 650 ° C for at least 4 h.

[0042] (4) Before performing hot dip coating, the surface of the Q235 is used to facilitate the coating group to become ZnCl. 2 300 g / l, NaCl 30g / L, NAF 5g / L, the helper plating temperature was 75 ° C, and the time was 30s; the last at 70 ° C was dried, and the time was 5 min. .

[0043] (5) Before immersing in the Zn-Cu-Ti-Ce bath, the scum and zinc gray on the surface of the zinc bath should be applied, and the temperature is placed at 700 ° C ± 5 ° C. When hot dip plating, the Q235 sample to be plated should be preheated, and the dipover 25s pulls out, pulled the speed of 1.5 cm / s, pulled out of the supermosite water.

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