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Pipe joint rust removing method

A pipe joint and derusting oil technology, which is applied in the coating process of metal materials, etc., can solve the problems of easy re-rusting, complicated process, easy rusting of pipe joints, etc., and achieve rapid derusting, simple process and convenient operation Effect

Inactive Publication Date: 2018-04-20
NINGBO YINZHOU LUTONG HYDRAULIC PIPE FITTINGS FACTORY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pipe joints are connected by internal threads. The outer surface of the pipe joints is easy to rust, and the rusty pipe joints need to be derusted. The current derusting method is more complicated, and it is easy to rust again after derusting

Method used

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Embodiment Construction

[0016] The following describes the embodiments of the present invention in detail.

[0017] A pipe joint rust removal method is characterized in that it comprises the following steps:

[0018] a. To remove slag, sand the outer surface of the pipe joint to remove rust spots;

[0019] b. Cleaning, rinse the workpiece with a 5-10MPa high-pressure water gun;

[0020] c. Soak in derusting oil for 1-2 hours;

[0021] d. Neutralization treatment, adding the workpiece soaked in the derusting oil into the alkaline solution for neutralization treatment;

[0022] e. Clean, wash with warm water at 50-70°C for 20-30 minutes;

[0023] f. Drying, dry the workpiece with a dryer.

[0024] In this embodiment, in step c, the composition of the derusting oil is: sodium petroleum sulfonate 4-7g / L, calcium petroleum sulfonate 6-10g / L, zinc oxide 18-22g / L, sulfuric acid 12-15ml / L, hydrochloric acid 18-25ml / L, hydrogen peroxide 30-35mL / L, the rest is water, and the working temperature of derust...

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PUM

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Abstract

The invention provides a pipe joint derusting method, comprising the following steps: a, removing slag, sanding the outer surface of the pipe joint to remove rust spots; b, cleaning, washing the workpiece with a high-pressure water gun of 5-10 MPa; c, immersing and derusting Oil for 1-2 hours; d, neutralization treatment, add the workpiece soaked in rust-removing oil to alkaline solution for neutralization treatment; e, cleaning, wash with warm water at 50-70°C for 20-30 minutes; f, drying , Dry the workpiece with a dryer. The rust removal method for the pipe joint of the present invention has simple process and convenient operation, can quickly remove rust, and simultaneously generates an oxidized coating to achieve better rust prevention effect.

Description

technical field [0001] The invention relates to a metal surface rust prevention method, in particular to a pipe joint rust removal method. Background technique [0002] Pipe joint is a hydraulic term, which is a part that connects pipelines or installs pipelines on hydraulic components in a hydraulic system. This is a general term for connections that can be assembled and disassembled in fluid passages. The pipe joints are connected by internal threads. The outer surface of the pipe joints is easy to rust, and the rusty pipe joints need to be derusted. The current derusting method is more complicated, and it is easy to rust again after derusting . Contents of the invention [0003] 【1】Technical problems to be solved [0004] The technical problem to be solved by the present invention is to provide a rust removal method for pipe joints which has a simple process and generates an oxidized coating while removing rust to achieve a better rust prevention effect. [0005] 【2】...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02C23C22/48
CPCC23G1/02C23C22/48
Inventor 朱宏娟
Owner NINGBO YINZHOU LUTONG HYDRAULIC PIPE FITTINGS FACTORY
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