Fuel tank pickling and phosphating line
Simple description
Pretreatment equipment consists of tank dip type pretreatment phosphating treatment production line.
The tank-immersion pretreatment phosphating production line consists of thirteen processes such as degreasing, pickling, neutralization, surface conditioning, phosphating, washing, hot water washing, and so on.
The conveyance of workpiece adopts self-propelled hoist, so that the workpiece can be driven by self-propelled hoist to complete the technological requirements of each process.
Product Display
Pretreatment process
Workpiece's hanging basket size: customized, depending on the fuel tank size, the basket is made of SUS304.
No. |
Process |
Method |
Treatment liquid |
Water in/out time |
Treatment time (min) |
Treatment temp. (℃) |
1 |
Hot water rinse 1 |
Dipping |
Industrial water |
1 |
3 |
50-55 |
2 |
Predegreasing |
Dipping |
Degreaser |
1 |
6 |
50-55 |
3 |
Degreasing |
Dipping |
Degreaser |
1 |
6 |
50-55 |
4 |
Water rinse 1 |
Dipping |
Industrial water |
1 |
3 |
RT |
5 |
Water rinse 2 |
Dipping |
Industrial water |
1 |
3 |
RT |
6 |
Pickling |
Dipping |
Phosphoric acid |
1 |
24 |
RT |
7 |
Water rinse 3 |
Dipping |
Industrial water |
1 |
3 |
RT |
8 |
Neutralization |
Dipping |
Neutralizer |
1 |
3 |
RT |
9 |
Water rinse 4 |
Dipping |
Industrial water |
1 |
3 |
RT |
10 |
Surface conditioning |
Dipping |
Surface conditioner |
1 |
3 |
RT |
11 |
Phosphating |
Dipping |
Phosphating agent |
1 |
12 |
45-55 |
12 |
Water rinse 5 |
Dipping |
Industrial water |
1 |
3 |
RT |
13 |
Hot water rinse 2 |
Dipping |
Industrial water |
1 |
3 |
80 |
Note: Pretreatment processing time varies with different agents, the specific process time and temperature provided by the agent manufacturer.
Process description
The degreasing process adopts two-stage cleaning with pre-degreasing and degreasing, which can effectively remove the oil and dust on the surface of the workpiece and obtain high surface quality. Pickling can effectively remove the rust on the surface of the workpiece.
Pre-treatment pre-greasing, degreasing, hot water rinse heating is directly heated by stainless steel heat exchanger in the tank, and the phosphating tank liquid heating is indirectly heated by stainless steel plate heat exchanger.
In order to save water, the water washing room adopts counter-current rinsing process.
Conveyor device
Technical performance parameters of self-propelled hoist conveyor line
No. |
Name |
Technical parameter |
1 |
Walking speed |
15/min (non-working section) |
2 |
Lifting and lowering speed |
4m/min |
3 |
Lifting height |
4m |
4 |
Production TAKT |
6min |
5 |
Lifting weight |
3000kg |
6 |
Process section self-propelled hoist speed |
0.5-1.0 m/min (frequency conversion speed control) |
7 |
Turning radius |
2-meter turning radius for trolley |
8 |
Track |
I32a1, 6mn |
9 |
Control method |
Automatic, manual |
10 |
Lifting hoist |
Single hoist with approx. 2.5t capacity |
11 |
Hoist trolley and hanger |
Adopt double-trolley and the hanger is designed together |
12 |
Flame retardant sliding contact line |
C type |