Hoop surface hot dip coating tin alloy process

Abstract

The invention discloses a hoop surface hot dip coating tin alloy process. The hoop surface hot dip coating tin alloy process comprises the steps of sanding, alkali wash oil removal, acid pickling, plating assisting, preheating, hot dip coating and analysis and detection. According to the hoop surface hot dip coating tin alloy process, no harmful heavy metal ion or phosphorus or sediment exists, heating is not needed, the treatment time is short, the number of treatment steps is small, a surface adjusting procedure can be omitted, hot drip coating can be reused, and the adhesive force of a metal coating to a substrate is effectively improved.

Description

technical field

[0001] The invention relates to the technical field of metal protection, in particular to a process of hot dip tin alloy plating on the surface of stirrups. Background technique

[0002] With the wide application of metal products in industry and life, the corresponding metal corrosion is also becoming more and more serious. Therefore, various anti-corrosion technologies are also widely used in metal processing. Among them, the metal surface coating protection technology is the most widely used and the most effective.

[0003] At present, the pretreatment of painting, powder spraying or electrophoresis is mostly phosphating and chromium passivation treatment according to different device plates. However, these two processing methods have major defects. In terms of environmental protection: phosphating contains heavy metal ions such as zinc, manganese, and nickel and contains a large amount of phosphating slag. Chromium passivation treatment itself contains s...

Examples

Embodiment 1

[0025] A process for hot-dip tin alloy plating on the surface of stirrups, which specifically includes the following steps:

[0026] S1. Use 200#, 800#, 1000# sandpaper to polish the surface of the stirrups to remove the burrs and debris generated during processing;

[0027] S2, alkali washing to remove oil: immerse the stirrups in S1 in 50-60 0 C, 25-30min in sodium carbonate solution of 25g / L to remove oil stains;

[0028] S3. After the alkali washing is completed, rinse with water for several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkaline solution and surfactant on the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0029] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min, the main purpose of pickling is to remove its oxide skin, oxide film and alkali solution remaining on the surface of the stirrup substrate, and then use pure water ...

Embodiment 2

[0038] A process for hot-dip tin alloy plating on the surface of stirrups, which specifically includes the following steps:

[0039] S1. Use 200#, 800#, 1000# sandpaper to polish the surface of the stirrups to remove the burrs and debris generated during processing;

[0040] S2, alkali washing to remove oil: immerse the stirrups in S1 in 50-60 0 C, 25-30min in sodium carbonate solution of 25g / L to remove oil stains;

[0041] S3. After the alkali washing is completed, rinse with water for several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkaline solution and surfactant on the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0042] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min, the main purpose of pickling is to remove its oxide skin, oxide film and alkali solution remaining on the surface of the stirrup substrate, and then use pure water ...

Embodiment 3

[0051] A process for hot-dip tin alloy plating on the surface of stirrups, which specifically includes the following steps:

[0052] S1. Use 200#, 800#, 1000# sandpaper to polish the surface of the stirrups to remove the burrs and debris generated during processing;

[0053] S2, alkali washing to remove oil: immerse the stirrups in S1 in 50-60 0 C, 25-30min in sodium carbonate solution of 25g / L to remove oil stains;

[0054] S3. After the alkali washing is completed, rinse with water for several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkaline solution and surfactant on the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0055] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min, the main purpose of pickling is to remove its oxide skin, oxide film and alkali solution remaining on the surface of the stirrup substrate, and then use pure water ...

technical field

[0001] The invention relates to the technical field of metal protection, in particular to a process of hot dip tin alloy plating on the surface of stirrups. Background technique

[0002] With the wide application of metal products in industry and life, the corresponding metal corrosion is also becoming more and more serious. Therefore, various anti-corrosion technologies are also widely used in metal processing. Among them, the metal surface coating protection technology is the most widely used and the most effective.

[0003] At present, the pretreatment of painting, powder spraying or electrophoresis is mostly phosphating and chromium passivation treatment according to different device plates. However, these two processing methods have major defects. In terms of environmental protection: phosphating contains heavy metal ions such as zinc, manganese, and nickel and contains a large amount of phosphating slag. Chromium passivation treatment itself contains s...

Examples

Embodiment 1

[0025] A process for hot-dip tin alloy plating on the surface of stirrups, which specifically includes the following steps:

[0026] S1. Use 200#, 800#, 1000# sandpaper to polish the surface of the stirrups to remove the burrs and debris generated during processing;

[0027] S2, alkali washing to remove oil: immerse the stirrups in S1 in 50-60 0 C, 25-30min in sodium carbonate solution of 25g / L to remove oil stains;

[0028] S3. After the alkali washing is completed, rinse with water for several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkaline solution and surfactant on the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0029] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min, the main purpose of pickling is to remove its oxide skin, oxide film and alkali solution remaining on the surface of the stirrup substrate, and then use pure water ...

Embodiment 2

[0038] A process for hot-dip tin alloy plating on the surface of stirrups, which specifically includes the following steps:

[0039] S1. Use 200#, 800#, 1000# sandpaper to polish the surface of the stirrups to remove the burrs and debris generated during processing;

[0040] S2, alkali washing to remove oil: immerse the stirrups in S1 in 50-60 0 C, 25-30min in sodium carbonate solution of 25g / L to remove oil stains;

[0041] S3. After the alkali washing is completed, rinse with water for several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkaline solution and surfactant on the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0042] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min, the main purpose of pickling is to remove its oxide skin, oxide film and alkali solution remaining on the surface of the stirrup substrate, and then use pure water ...

Embodiment 3

[0051] A process for hot-dip tin alloy plating on the surface of stirrups, which specifically includes the following steps:

[0052] S1. Use 200#, 800#, 1000# sandpaper to polish the surface of the stirrups to remove the burrs and debris generated during processing;

[0053] S2, alkali washing to remove oil: immerse the stirrups in S1 in 50-60 0 C, 25-30min in sodium carbonate solution of 25g / L to remove oil stains;

[0054] S3. After the alkali washing is completed, rinse with water for several times until the clean stirrup surface is exposed. The purpose is to prevent a small amount of alkaline solution and surfactant on the stirrup matrix from entering the next process of pickling, and neutralize the effect of the acid solution. ;

[0055] S4, at 40-63 0 C. Pickling in 15g / L sulfuric acid solution for 1-3min, the main purpose of pickling is to remove its oxide skin, oxide film and alkali solution remaining on the surface of the stirrup substrate, and then use pure water ...