POWDER COATING PRE TREATMENT

Pre-treatment is applied for materials that is prepped before you apply any sort of coating to the surface.
Our pre-treatment services include chemical conversion coating, dry-in-place sealers and zinc phosphate.
Pre-treatment purpose on the substrate coatings is to ensure a cleaned materials only sent into processing for coating, and materials does not contain any other mixtures of substances that may affect the quality of materials.
Pre-treatment Usage:

DEGREASE OR CLEANING

Pretreatment starting from cleanses of surfaces is to ensure a cleaned materials only sent into processing for coating and materials does not contains any other mixtures of substances that may affect the quality of materials

corrosion protection & Performance

Zinc Phosphate as a chemical conversion coating which will provide a protective barrier that will prevent corrosion and oxidization of the metal. It is a protective barrier that will prevent corrosion and oxidation of metal. Dry-in-place sealers allow for a stronger performance with corrosion resistance

chemical resistance

Ensure that the surface of materials to be coated are not contaminated with other substances that may affect corrosion protection, visible color or appearance of the coating.

PRE-tREATMENT facilities

5 Stage Tank
Pre-treatment System

Our Conveyor Production Line is equipped with pre-treatment facility; operating the full coating workflow cycle in the 5 Stages pre-treatment automatically

Auto | Manual Tanks Pre-treament System

Operating either in automated or manually. Pre-treatment materials is highly depending on the facility type in used

9 Stage Tank
Pre-treatment

Each tank is aligning with require process materials for the pre-treatment phases before loading moving to next process in powder coating cycle

PRE-TREATMENT DETAILS

Pre-treatment is carried out by dipping into a sequence of tanks containing different chemical solutions and following into next sequences stage to complete the pretreatment process.
Pre-treatment creates a surface that the coating can adhere to whether the coating is liquid or powder, and it is a process to ensure the surface is cleaned and prepared to be coated.

DEGREASING / CLEANING STAGE

Degreasing step oil, grease and other surface contaminations are removed from the profile surface to obtain a clean surface prior to etching. Inhibitors are often added to protect the metal surface from attack during this cleaning operation.

RINSING STAGE

A step process to remove chemicals from the profile surface and prevent carry over and contamination of solution. Mains water is normally good enough after the first pre-treatment steps, but in the final rinsing step the water should be very clean to avoid adhesion and corrosion problems.

eTCHING OR DEOXIDISATION PHASE

Deoxidisation process any smut resulting from insoluble from the etching is removed. This smut layer consists of oxides like magnesium oxide, intermetallics, silicon etc. which are not soluble in alkaline solutions in the temperature room

CONDITIONING INSPECTION

Preparing the surface to accept product for the best results possible requires some sort of conditioning agent. Essentially, the conditioner is applied.

DRY OFF AND DOUBLE RINSING

A dry off oven basically quickly removes any moisture left on the part from the last rinse. The longer moisture stays on the part, the more susceptible it is to a layer of ‘flash rust’ forming. Moisture on the surface will interfere with the coating process. The temperature of the profile surface should not be too high in the drying oven.

Surface Preparation for Materials

Surface preparation can affect on the quality of performance. The quality of surface preparation has a direct relation with the lifetime of a system. Surface preparation consists of removing mill scale, rust, corrosion products, removing of all soluble salts, oil, grease, drilling , cutting components and any foreign matter from the material surface.

Surface Profile

Surface profile indicates the roughness of blast cleaned surface. The profile of roughness obtained during blasting and is highly dependable on the abrasive media, the air pressure and technique of blasting.

Apply using blasting to obtain the surface profile for depths between 1.5 and 3 mils.

Following are the type of materials applicable for surface preparation

Aluminium

Surface is require to be clean and dry. Corrosion salts should be removed by light abrasion and water washing. The aluminium can be etched by using acidic solution or etch primer

Galvanised Steel

Surface should be clean and dry. Degreasing of most galvanised surfaces need time and effort to obtain a clean surface. Any zinc corrosion products can be removed by high pressure water washing or with scrubbing. Many coatings based on non-saponifiable polymers can be applied directly to galvanised surfaces.
May apply acid etch solution or etch primer to passivate the surface and shall provide a key for further paint coatings. If the steel been treated with passivating treatment after galvanising, then it must be allowed to weather off over a period of time in months under exposure or be abraded before application process of powder coating.

Stainless Steel

Stainless steel does not require any particularly specialized surface pre-treatment prior to coating. It requires to ensure the surfaces is free from oil, grease, dirt and other materials during chemical cleaning. The development of surface profile should apply on stainless steel to assure a good coating adhesion. Surface profile is the depth of between 1.5 and 3 mils is recommended for process in coating systems. Due to the metal is orgin hard, abrasive blasting is recommended to impart a continuous surface profile.

OUR PRE-TREATMENT : 9 STAGE TANK

Tank 1 - AKALINE DEGREASING STAGE

AKALINE DEGREASING AND CAUSTIC SATIN-LIKE ETCHING (FOR CLEANING, SMOOTHENING AND CREATION UNIFORM ALUMINIUM SURFACES)

TANK 2 - OVERFLOW WATER RINSING STAGE