Groupe POMMIER Date : 06/01/10 Authored by: JL. Pigeot Approved by: T. Preud’homme
Signature: Signature:
I)SCOPE
The prent specification definies the non metallic surface treatment applied on the metallic surface for this protection. This document specifies which requirements we have to fullfil in term of quality level; esthetic and protection level.
II)REFERENCE
Standard
ISO 2409 : Paints and varnish - Test of squaring
ISO 9227 : Corrosion tests in artificial atmospheres - Salt spray tests巴西世界杯赛程表
Regulation : EEC 2000/53 End of life vehicle
ISO 4628 : Paint and varnishes. Evaluation of degradation
III) KTL COATING (ELECTROLYTIC PAINT DEPOSITS ON STEEL OR ALUMINIUM)
III.1) PRINCIPLE
The paint ud shall be a primary cationic, which is a dispersion of organic molecules and mineral pigments in an aqueous solution. If one applies a voltage of 200 to 350 VDC between the parts immerd in the cathode and the electrolysis cells rving as anodes, the positively (+) charged organic molecules move to the cathode along with the mineral pigments, such that the molecules and pigments are deposited simultaneously on the negatively (-) charged parts. Conquently, the parts are covered with a very uniform paint film that has to be rind and polymerid.
Groupe POMMIER Date : 06/01/10 MANUFACTURE
The process includes the following operations:
- Shot blasting (e note)
- Degreasing
- Zn + Ca phosphatisation
- Chromating (Chrome VI free)
- Electrolytic painting
- Baking
Note: The shot-blasting step shall be defined and be included in the manufacturing process for all the parts from, casting process (aluminium, iron) and forging process.
A stone blasting step shall be defined and included in the manufacturing process for all the parts from cutting stamping and lar process.
The stone-blasting step for big or/and heavy part from cutting, lar cutting is replaced by the shot-blasting.
The goal is the suppress of any sharp angle, and any dirt from the process, and to get a reproductive quality level.
The range of preparation tasks shall be as follows:
PREPARATION RANGE (for example)
1 Alkaline degreasing by spraying 10 Demineralid water rin
2 Alkaline degreasing bath 11 Demineralid water rin
3 Rinsing 12 Powercron cataphoresis, 6200 HE 15 to 40
4 Rinsing 13 UF recycling via spraying
5 Layer refiner 14 New UF rinsing via spraying
6 Tri-cation phosphatisation bath 15 Demineralid water rin
neeaielts7 Rinsing 16 Demineralid water rin
8 Rinsing 17 Oven baking
9 No Chromic passivation
The standart colour is black and the shot blasting option is requested and specified on the drawing.
Groupe POMMIER Date : 06/01/10
APPLICATIONS
The cataphoresis paint can be applied to all conductive metals: steel, copper alloys, aluminium alloys, iron, zinc and alloys (zamack).
The paint layer’s homogeneity is particularly well suited for the following parts:高考英语作文出炉
. castings: excellent penetration on all areas of the part
without. turned parts: preci thickness of the layer
. cutting parts
. casting parts
. etc.
III.2) COATING CHARACTERISTICS
APPEARANCE
There shall be no obrvable defect that detracts from the sheet’s aesthetic appearance or its resistance over time:
- Colour defects: floating, frosting, marbling, streaking, hazing, mottling, etc.
- Superficial finish defects: bubbling, curling, checking, blistering, cracking, rippling, sinkage, orange peel, etc.
- Defects following a poor application: running, draping, sagging, exfoliation, wrinkling, etc.
TYPE OF PAINT
Epoxy
COATING THICKNESS
The thickness of the coat shall never be less than 15 microns (15 to 20 microns).
- coverage of ridges
- possibility to eliminate machining after painting: threads, bores, fittings, etc.
Excellent adherence on all substrates including galvanid steel.
Penetration: possibility to treat the inside of tubes, already asmbled asmblies (however, it is critical that the parts or asmblies are designed to allow treating products to flow).
Groupe POMMIER Date : 06/01/10
III.3) TESTING AND EVALUATION CRITERIA
APPEARANCE
The coating’s appearance shall be controlled visually.
COATING THICKNESS
Thickness shall be measured by the magnetic method.
CORROSION RESISTANCE
a)Adherence shall be checked by the gripping test according to the standard NF EN ISO 2409.
Minimum level AD0
b)According to standard ISO 9227, the resistance to salt spray shall be 500 hours on ridges and
1000 hours on flat surfaces without the appearance of red rust.
那个男人 the oneEvaluation criteria according to EN ISO 4628 :
. Rusting rate : Ri0关于中秋节的手抄报的图片
. Blistering rate : 0(S0)
. Propagation at cracks : 2mm
Groupe POMMIER Date : 06/01/10 IV) CATAPHORESIS + PAINT
在职教育硕士分数线
IV.1) PRINCIPLE
The treatment is intended to increa the product’s resistance to chemical attacks. It involves performing a cataphoresis and then applying a polyester or polyurethane bad paint according to the specify by the paint supplier.
IV.2) CHARACTERISTICS
APPEARANCE
There shall be no obrvable defect that detracts from the sheet’s aesthetic appearance or its resistance over time:
- Colour defects: floating, frosting, marbling, streaking, hazing, mottling, etc.
- Superficial finish defects: bubbling, curling, checking, blistering, cracking, rippling, sinkage, orange peel, etc.
- Defects following a poor application: running, draping, sagging, exfoliation, wrinkling, etc.
PAINTING
- Epoxy type cataphoresis
- Polyester-bad paint
COATING THICKNESS
The thickness of the cataphoresis coat shall never be less than 15 microns (15 to 20 microns). Excellent adherence on all substrates including galvanid steel.
The thickness of the polyester paint coat shall never be less than 40 microns.
- coverage of ridges
- possibility to eliminate machining after painting: threads, bores, fittings, etc.
2weeks
Groupe POMMIER Date : 06/01/10
IV.3) TESTING AND EVALUATION CRITERIA :
APPEARANCE
The coating’s appearance shall be controlled visually.
COATING THICKNESS
Thickness shall be measured by the magnetic method.
BRIGHTNESS
When specified, it must be checked with brightness machine (ISO 2813)
CORROSION RESISTANCE
In order to approve a new product or process, this complete t of tests must be performed, ie :
. Salt spray test according to ISO 9227
This type of treatment shall resist 1000 hours to a salt spray without the appearance of red rust according to ISO 9227.
. The evaluation criteria according to EN ISO 4628 are :
. Rusting rate : Ri0
. Blistering rate : 0(S0)
. Propagation at cracks : 2mm
postmaster. Adhesion test (gripping test) according to ISO 2409 (specified level : AD0)
the key. Resistance to water (immersion 24hrs at 60°) ISO 1521 (specifed level AD0, measurement must be realid after 24 hrs dry), no surface defect or adherence change must be noted
