Cross-cut test

Specification for electroplated coatings of 65/35 tin/nickel alloy Method for the evaluation of results of accelerated corrosion tests on metallic coatings Methods of test for paints Cross-cut test Pull-off test for adhesion Resistance to artificial weathering (enclosed carbon arc) and Addendum No. 1 Resistance to continuous salt spray Notes for guidance on the conduct of natural weathering test... 

Figure 11.7 Cross-cut test paint film classification.

Figure 5.28. Electrostatically painted injection molded parts containing carbon nanotubes (a) plate which has been characterized by a cross-cutting test, and (b) car front fender (photo by R. Wolf, IFF Dresden)...

As discussed, the degree of adhesion is critical to the effectiveness of a paint coating. Consequently, the specification of the degree of adhesion must be supplied by each paint manufacturer. Because of this, routine methods for the measurement of the degree of adhesion have been established for the purpose of quality testing. The most popular test used is the cross-cut test, which is quite often complemented with pull-off methods. Both methods have been the subject of standardization. 

The ISO has established procedures for conducting this test in ISO 2409 Paint and Varnishes Cross-cut Test. Basically, this test consists of cutting a... 

In the cross-cut test, which is the most commonly used of the lateral stress methods, knife blades scribe the coating down to the metal in a grid pattern. The spacing of the cuts is usually determined by the coating thickness. Standard guidelines are given in Table 8.2. The amount of paint removed from the areas adjacent to, but not touched by, the blades is taken as a measurement of adhesion. A standard scale for evaluation of the amount of flaking is shown in Table 8.3. 

Adhesion Cross-cut test value similar before and after tape test... 

Copper and aluminium substrates partially coated with hybrid sol-gel layers, after 14 days in the condensed water test (DIN EN ISO 6270-2) on top of the copper substrate, a cross cut test (DIN EN ISO 2409) and a taber abraser test (DIN 52347) Is visible in addition... 

Once the cuts have been made the grid is brushed lightly several times The results are compared with the reference values in Table performance indicator. The cross-cut test is purely... 

An enhancement to the cross-cut test is to apply adhesive tape to the grid. The tape is then pulled off by hand in a smooth action (preferably at an angle of 90°) and the grid is then assessed as per Table 6.2. In order to maximize the comparability of measurement, the results should always be stated together with the adhesive strength of the adhesive tape used and if possible the angle at which the tape is pulled off. 

Deutsches Institut fur Normung e. V. (DIN) Paints and varnishes - Cross-cut test. Berlin Beuth-Verlag, 2007. 

The cross-cut adhesion test provides a rating for the adhesion of a surface material to a plastic substrate. The original ASTM standard D3359-02 for the cross-cut adhesion test was developed to measure the adhesion between thin paint films and flat, metal substrates. This test, however, is not well suited for three dimensional plastic parts that are covered with fabric. It will be shown in this study that improper cross-cut testing protocol can result in false failures and artificially low adhesion performance scores. A modified cross-cut adhesion test procedure is documented here that is based on the ASTM method and is applicable to fabric covered parts. 

Plastic parts with fabric attached to the surface must pass a series of durability tests including the cross-cut adhesion test. The cross-cut test is important in order to assess the adhesion strength of the fabric to the snbstrate plastic. This adhesion test provides a rating for the adhesion between all layers from the fabric surface down to the substrate plastic. The original ASTM standard D3 3 59-02 was developed to measme adhesion between thin paint films and flat, metal snbstrates (4). The cross-... 

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