Process link
problem
the reason
Solution
except
oil
unit
Minute
Degreasing is not clean
1, in addition to low oil concentration
1, increase the concentration
2. Short oil removal time
2, extend the time
3, low oil removal temperature
3, increase in temperature
4, local grease is too thick
4, increase the pretreatment (manual)
5. Thickness of grease floating on the surface of the oil sump
5, the oil layer out
6, spray nozzle clogging
6, strengthen the cleaning nozzle
7, large workpiece processing, no timely addition
7, add pharmaceuticals in time
except
rust
unit
Minute
Rust removal is not complete
1, low derusting liquid concentration
1, increase the concentration
2. Short derusting time
2, extend the time
3, the formation of high temperature oxide scale is too thick, too thick
3. Increase mechanically assisted derusting
4, iron ion content in the rust removal solution is too high, anti-rust liquid failure
4, replace the new bath
Excessive rust liquid acid or hydrogen embrittlement or over-corrosion after rust removal
1, the concentration is too high
1, adding water dilution
2, lack of additives
2, add additives
3, too long
3, time reduction
phosphorus
Change
unit
Minute
Phosphate film crystal rough
1, high free acidity
1. Use neutralizer to reduce free acidity
2, there is residual acid
2. Strengthen the washing of water
3, the workpiece surface over corrosion
3, control the concentration, time
Phosphate film is too thin, no obvious crystallization
1, low free acidity
1. Add phosphating solution and then adjust the neutralizer
2, high total acidity
2, diluted with water
3, the workpiece surface has a hardened layer
3, strengthen pickling
4, the temperature is too low
4, increase the temperature
5, ferrous ion content is too low
5, increase the ferrous ion
Phosphating film is poor in corrosion resistance and shows back rust during drying
1, phosphate film rough
1, reduce the free acidity
2, low total acidity
2, increase the phosphating solution
3, the workpiece surface residual solution
3, strengthen and wash in water
4, low phosphating temperature
4, increase the temperature
5, short phosphating time
5, increase the time
6, the workpiece overlaps in the drying process
6, separate monomer placement
7, the workpiece part of the phenomenon of water
7, change the workpiece placement angle
After phosphating, the workpiece has ash
1, the free acidity is too low
1, increase the free acidity
2, washing is not clean
2, strengthen the washing
Phosphate film uneven
1, degreasing
1, strengthen the degreasing
2, the workpiece surface has a hardened layer
2, strengthen pickling
3, uneven material after heat treatment
3, strengthen pickling
1, the ferrous ion content is too high
1, using hydrogen peroxide treatment
2, pickling bath into the phosphating solution
2, strengthen the washing and neutralization, pay attention to the operating process
Door panel: door panel is made of stainless steel 304 with no frame. Core materials are paper honeycomb, aluminum honeycomb, PU, EPS and etc. The installation sites of door lock, door closer and hinge are reinforced with square tubes of more than1.5mmthickness which are compression moulded by special technology.
Door frame: it is made of completely stainless steel 304. The connection types with wallboards are double-clip type and aluminum connection. The former is applied mostly to machine made wallboard and the latter hand made wallboard. The accessories are double window and lift type sweeping bar. The lock can be famous door lock or the owners can select lock brands themselves.
Specification: common sizes 800X2100, 900X2100, 1500X2100 or1800X2100, can customize to customers` requirements, the materials can be selected according to customers` requirements such as306Lor other special materials.
Features: the stainless steel 304 door we produced are of elegant appearance, sturdy and durable, acid and rotting resistance and thermal insulation. It is the first choice for high-end projects at home and engineering concerning foreign affairs that requires for anticorrosion and high quality such as electronics factory and food factory
Hospital Sliding Door,Hospital Automatic Sliding Door,Hospital Sliding Glass Door,Hospital Sliding Ward Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.selfrepairinghighspeeddoor.com