酸洗磷化工艺(3)

铁舾件的酸洗磷化工艺

A) Dry way: general natural dry, hot wind drying it when overcast and rainy. B) The shop must neatly when the piping dry, and prevent the sundries into the piping. 2.7 Seal

2.7.1 Seal: in order to prevent the dusty, sundries, humidity into the piping, prevent

damage the piping end when moving the piping then reduce quality.

2.7.2 Seal way: use the PVS cover seal the end, and the connection is sealed by

adhesive type, ensure the inner piping tight.

3. Notice

3.1 The piping must incline when put the piping into slot, avoid the air bubble.

3.2 Use the alkali neutralize the rest HCl liquid from welding seam inner piping, ensure not

rust on the welding seam before finished product leave factory.

3.3 The process including: wash, the piping enough dip, often turn over it.

3.4 Second antirust: use anticorrosive oil or gas anticorrosive according to client requirement. 3.5 Storage: Seal the pipe end when the inner piping is dry, outside pipe lay in the dry

atmosphere before painting.

3.6 Not rust, scale mill and sundries inner piping after phosphating.