Hardware cleans hardware of the choice in craft to clean the importance of the agent

Hardware workpiece welder art, before soldering it is very important to clean processing, what pledge to hardware workpiece material is different, its solder craft demand is diverse also, need chooses different hardware workpiece to clean an agent, the hardware material on common market pledges cent is iron and steel, carbon steel, alloy steel, cast-iron wait. Differ with what occupy different figure and application, the technique that its clean is different also, but uses hardware workpiece clear lotion can be same. Below, kang Shi course of study follows Dongguan city inscription according to coming for years the client's reaction, summed up below, the craft that commonly used hardware workpiece cleans reachs a method.
One, before soldering clean craft
1, before iron and steel solders clean craft
Before ⑴ mild steel solders clean processing, what apply the most extensively is gush sand preparation, of gush sand preparation solder intensity is best.
Before ⑵ stainless steel solders clean processing, stainless steel is all steely material in be in exclusively the rolled steel that intensity solders to rise after acid etching is handled. Commonly used acid etching method has processing of heavy chromic acerbity oxidation; Chromic acid treatment of accentuation of vapor spray rinsing; Nitric acid - hydrochloric acid mixes acerbity oxidation; Nitric acid - after oxidation of hydrofluoric acid mixed liquor is handled, passivation handles heavy chromic acid.
2, before lacquer clean craft
Iron and steel should undertake before spray paint defatted go the rust processing that removes dirt, and should undertake phosphating forms phosphatic diaphragm in abluent steely surface become rusty in case.
Steely before spray paint clean typical technological process to be macerate means, it includes following process:
→ of defatted → bath divides phosphor of → of nap of surface of → of rubiginous → bath to change film to handle aftertreatment of → bath → → is dry
3, of oil pressure pipeline clean
When installing oil pressure supply unit, cop must pass sufficient pickling. Before fluid chamfer pickling, the tubal material that be corroded significantly to having or sticks bits having solder should brush a these bilge Qing Dynasty to be brushed with steel wire. The application that conduit wall is stained with paint film comes off paint film except lacquer agent again pickling. Stick the conduit that has antirust oil or oil to should undertake first defatted clean. Pickling counteracts the program of → bath to undertake by → of pickling → bath. Pickling uses the solution of 5% hydrochloric acid that contains corrosion inhibiter to undertake below normal temperature commonly. Can be in pipe after pickling chamfer is cleaned clean, assemble, after also can using cop to assemble, the loop that use acid is cleaned. The means efficiency that makes with pump after conduit is assembled acerbity fluid circulates inside conduit is taller. Its working procedure is: Clean 3h circularly with normal temperature of 5% hydrochloric acid, pour scour off sick at heart with water, natrium of 0.5% hydrogen oxidation or sodium carbonate aqueous solution counteract reoccupy clean 2h, next sufficient bath.

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