In the application of salt spray corrosion test chamber test before the sample v

The test piece according to the coating characteristics and cleaning level and must do moderate cleaning, can not make abrasive liquid and have leaching or inhibit the effect of organic solvent cleaning, and cleaning method can not damage the surface, for stainless steel plate test piece can be sold and bought by both sides of the agreement to apply sodium chemical cleaning and passivation treatment, test piece after quiet (according to pull water solubility test), with clean cloth or absorbent will moisture wipe water, or with no oil stains of dry and boring gas Drying, when forced, can apply magnesium oxide paste, this paste is 10g test drug grade magnesium oxide added to 100mL of pure water.

If not otherwise specified, the test piece should be covered with a suitable layer of magnesium oxide, otherwise the substrate will be visible due to staining, or the coating will be defective due to marking.

 

The test should be covered with a suitable protective layer thickness. Insulating materials such as ceresin wax, butadiene tape, etc.

 

Hand-printed environmental contamination can lead to more serious test results, and all hand-printed environmental contamination should be avoided after the test piece has been cleaned.

 

Placement of the specimen: During the test, the specimen should be oriented in the test chamber in accordance with the following criteria.

 

The main surface of the specimen is skewed from 15 to 30 degrees from the plumb line, and when gazing from the top of the test chamber it should be parallel to the main subject of the nebuliser. Parts with many orientations of the main surface must be tested together, but multiple specimens may be placed so that each main surface can accept the brine sprayer together.

 

The test pieces should be placed so that the sprayer falls freely onto as many test pieces as possible, without preventing the sprayer from falling freely.

 

The specimens should not touch each other, metallic electrical conductors or chemicals with capillary effects, or other objects outside of the applicable rack.

 

The salt solution should not drip from one specimen to another.

 

Specimen identification marks or mounting holes should be placed directly underneath the specimen.