How to deal with rust and corrosion in customized sheet metal processing

Customized sheet metal processing how to deal with rust Reason:

1,the acid in the gap during the pickling passivation process has not been medium or medium,pickling phosphating into the skin film is not easy to rust,after spraying a period of time the rust will spread up the gap.

2,strong alkali acid pickling passivation,the strong alkali deoiling solution,residual in the crevice due to oxidation in close after each other,many manufacturers are not tap water clean and tidy,it's ivory products caused cracks after drying,when spraying after period of time,this kind of ivory products,with the erosion of gas substances caused by some kind of exothermic reaction in the overflow aperture place,this problem more.

The solutions to avoid corrosion in sheet metal processing are as follows:

1,deoiling must use weak alkali deoiling,can not be with alkali tablets,TAL should be controlled at 15POINT up and down,THE PH can not exceed 12.

2.For the process of pickling passivation,hydrochloric acid passivation can be selected.The time of pickling passivation is not too long,and the application of ammonium sulfate is just right.

3.After pickling and passivation,please use 1~2 sodium carbonate.

4,surface adjustment with hydrochloric acid this kind of chemical materials,the application of concentration value 1~2 degrees can be.

5,zinc acid pickling phosphating acid value should be limited,prepreg solution to try:TA:45,FA:1.3AC:8(20cc hair alcohol tube).

6.Do not clean and tidy all hand washing projects.Maintain overflow in hand washing.

What are the ways to customize sheet metal processing?

Sheet metal processing is not only a key technology for sheet metal technicians to grasp,but also an important process of sheet metal products forming.Sheet metal processing is the traditional cutting blanking,blanking processing,bending forming and other methods and technological parameters,including a variety of cold stamping die structure and technological parameters,a variety of equipment working principle and control methods,but also includes new stamping technology and new technology.Sheet metal parts processing is called sheet metal processing.What are the ways to customize sheet metal processing?

1,sheet metal processing products bottom rust removal

2,sheet metal processing products as epoxy zinc rich primer,used for steel structure and steel products rust primer,its coating has physical and chemical function,easy to construct,supporting function.Ingredients:epoxy resin,epoxy curing agent,zinc powder,antirust pigment,additives and machine solvent,etc.

3,sheet metal processing products as epoxy ming-iron central paint:with epoxy zinc-rich primer used as a transition layer,its role is to enhance the sealing of composite coating,also can be used as rust primer,coating film strong and tough,adhesion and sealing,and the front and rear coating compatibility.Its are divided into:epoxy resin and curing agent,mica iron oxide and rust-proof pigment,etc.

4,sheet metal processing products do the surface layer.It can be used as epoxy asphalt topcoat,chlorinated rubber topcoat,acrylic and polyurethane topcoat,fluorocarbon topcoat,etc.