CN104213132A - Chemical cleaning method of rust-proof aluminum alloy - Google Patents

Abstract

The invention relates to a metal cleaning method, in particular to a chemical cleaning method of rust-proof aluminum alloy. The method comprises the steps of degreasing, alkaline washing, flushing, actinic operation, flushing and drying in sequence. The method is simple in process and convenient to operate, and raw materials are easily obtained, and cheap. According to the method, oil contamination and oxide skin on the surface of the rust-proof aluminum alloy can be effectively removed, the efficiency is high, the quality is stable, and the chemical cleaning method of the rust-proof aluminum alloy is effective and suitable for batch production.

Description

A kind of chemical cleaning method of rust-preventing aluminum alloy

Technical field

The present invention relates to a kind of metal purging method, especially a kind of chemical cleaning method of rust-preventing aluminum alloy.

Background technology

Rust-preventing aluminum alloy mainly comprises that Al-Mn system and Al-Mg that can not heat treatment reinforcement be associated gold.Can improve intensity and hardness by work hardening.This class alloy Main Feature is that intensity is medium, plasticity and corrosion stability good, therefore be called corrosion-resisting aluminium, weldability is good, is aluminium alloy most widely used in welded construction.Rust-preventing aluminum alloy has use at aviation, boats and ships, train, container, is applicable to manufacture require underloading member or the parts such as process plastic is high, against corrosion, the pipeline of medium load, container, skeleton.Yet, because oxidized aluminum alloy can generate the aluminum oxide film of one deck densification, cause aluminium alloy in following process, to produce many defects, thereby impact is used.

Summary of the invention

The present invention is intended to address the above problem, and a kind of chemical cleaning method of rust-preventing aluminum alloy is provided, and its method is simple, cost is low, efficiency is high, and its technical scheme adopting is as follows:

A chemical cleaning method for rust-preventing aluminum alloy, its step is followed successively by:

A) degreasing: the grease of aluminum alloy surface is removed with gasoline, kerosene;

B) alkali cleaning: at the temperature of 40-50 ℃, Al alloy parts is placed in the sodium hydroxide solution of 6-10% (massfraction) and floods 30 minutes;

C) rinse: with a large amount of clear water, rinse Al alloy parts;

D) photochemical: under room temperature, Al alloy parts is placed in the salpeter solution of 30% (volume fraction) and floods 2 minutes, in and aluminium alloy be residual alkali lye, be that aluminum alloy surface is brighter and cleaner;

E) clean: with a large amount of clear water, rinse Al alloy parts;

F) dry: the air-dry or oven dry at low temperatures by Al alloy parts.

Tool of the present invention has the following advantages: its technique is simple, easy to operate, raw material is easy to get and is cheap, by this method, can effectively remove greasy dirt and the oxide skin on rust-preventing aluminum alloy surface, efficiency is high, steady quality, is a kind of chemical cleaning method that is effectively applicable to the rust-preventing aluminum alloy of batch production.

Accompanying drawing explanation

Fig. 1: cleaning step schematic diagram of the present invention;

Embodiment

Below in conjunction with accompanying drawing and example, the invention will be further described:

The chemical cleaning method of a kind of rust-preventing aluminum alloy as shown in Figure 1, its step is followed successively by:

A) degreasing: the grease of aluminum alloy surface is removed with gasoline, kerosene;

B) alkali cleaning: at the temperature of 40-50 ℃, Al alloy parts is placed in the sodium hydroxide solution of 6-10% (massfraction) and floods 30 minutes;

C) rinse: with a large amount of clear water, rinse Al alloy parts;

D) photochemical: under room temperature, Al alloy parts is placed in the salpeter solution of 30% (volume fraction) and floods 2 minutes, in and aluminium alloy be residual alkali lye, be that aluminum alloy surface is brighter and cleaner;

E) clean: with a large amount of clear water, rinse Al alloy parts;

F) dry: the air-dry or oven dry at low temperatures by Al alloy parts.

With way of example, describe the present invention above, but the invention is not restricted to above-mentioned specific embodiment, all any changes of doing based on the present invention or modification all belong to the scope of protection of present invention.

Claims (1)

1. a chemical cleaning method for rust-preventing aluminum alloy, is characterized in that, its step is followed successively by:

A) degreasing: the grease of aluminum alloy surface is removed with gasoline, kerosene;

B) alkali cleaning: at the temperature of 40-50 ℃, Al alloy parts is placed in the sodium hydroxide solution of 6-10% (massfraction) and floods 30 minutes;

C) rinse: with a large amount of clear water, rinse Al alloy parts;

D) photochemical: under room temperature, Al alloy parts is placed in the salpeter solution of 30% (volume fraction) and floods 2 minutes, in and aluminium alloy be residual alkali lye, be that aluminum alloy surface is brighter and cleaner;

E) clean: with a large amount of clear water, rinse Al alloy parts;

F) dry: the air-dry or oven dry at low temperatures by Al alloy parts.