Cov hlau cia lub sij hawm ntawm cov hluav taws xob cua sov raj tom qab kev kho mob sib txawv yog raws li nram no:

Cov hlau cia lub sij hawm ntawm cov hluav taws xob cua sov raj tom qab kev kho mob sib txawv yog raws li nram no:

(1) Aluminium alloy kho nrog ntub sandblasting rau 72 teev;

(2) Aluminium alloy kho nrog chromic acid sulfuric acid rau 6 teev;

(3) Anodized aluminium alloy, 30 hnub;

(4) Stainless hlau kho nrog sulfuric acid, 20 hnub;

(5) Steel sandblasted rau 4 teev;

(6) tooj dag kho nrog ntub sandblasting rau 8 teev.

1, Nto pretreatment txoj kev rau txhuas thiab txhuas alloy hlau

[Txoj Kev 1]

Kev kho degreasing. So nrog cov kuab tshuaj dampened nrog absorbent paj rwb, tshem tawm cov roj stains, thiab tom qab ntawd so ob peb zaug nrog ib daim ntaub huv si. Feem ntau siv cov kuab tshuaj muaj xws li trichloroethylene, ethyl acetate, acetone, butanone, thiab roj av.

[Txoj Kev 2]

Tom qab degreasing, tshuaj kho mob hauv cov tshuaj hauv qab no:

Concentrated sulfuric acid 27.3 Potassium dichromate 7.5 Dej 65.2

Soak ntawm 60-65 degree C rau 10-30 feeb, ces yaug nrog dej, cua qhuav, los yog qhuav hauv qab 80 degree C; Xwb, ntxuav hauv cov tshuaj hauv qab no ua ntej ziab:

Phosphoric acid 10 n-butanol 3 dej 20

Txoj kev no yog tsim rau phenolic nylon nplaum thiab muaj txiaj ntsig zoo.

[Txoj Kev 3]

Tom qab degreasing, tshuaj kho mob hauv cov tshuaj hauv qab no:

Ammonium bifluoride 3-3.5 Chromium oxide 20-26 Sodium phosphate 2-2.5 Concentrated sulfuric acid 50-60

Boric acid 0 4-0.6 dej 1000

Raus dej ntawm 25-40 degree C rau 4.5-6min, ces ntxuav thiab qhuav nrog dej. Txoj kev no muaj lub zog sib txuas siab thiab tuaj yeem sib koom ua ke hauv 4 teev tom qab kev kho mob. Nws yog tsim rau epoxy adhesive thiab epoxy nitrile adhesive bonding.

[Txoj Kev 4]

Tom qab degreasing, tshuaj kho mob hauv cov tshuaj hauv qab no:

Phosphate 7.5 Chromium oxide 7.5 Cawv 5. 0 Formaldehyde (36 38%) 80

Raus dej ntawm 15-30 degree C rau 10-15 feeb, ces ntxuav thiab qhuav hauv dej ntawm 60-80 degree C.

[Txoj Kev 5]

Tom qab degreasing, anodize hauv cov tshuaj hauv qab no:

Concentrated sulfuric acid 22g / l

Raus dej rau 10-15 feeb ntawm DC lub zog ntawm 1-1.5A/dm2, thiab tom qab ntawd hauv cov kua poov tshuaj dichromate saturated ntawm 95-100 degree C rau 5-20 feeb. Tom qab ntawd ntxuav nrog dej thiab qhuav.

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