Variasi Penambahan Hardener Pada Top Coat Paint Pada Material Baja ST 37 Terhadap Kekerasan Dan Tingkat Kerekatan

Nadhillian, Andyka Aghsal (2023) Variasi Penambahan Hardener Pada Top Coat Paint Pada Material Baja ST 37 Terhadap Kekerasan Dan Tingkat Kerekatan. Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

This study aims to determine the effect of the value of the hardener mixture with a value of 12%, 14%, 16%, 18% and an oven temperature of 70o C on the level of coating adhesion and hardness. From the results of the layers that have been made, first a thickness test will be carried out with a thickness gauge HW 300S to determine the evenness of the layer, then for the level of adhesion using a scratch tool, namely the cross cut test where this tool has 6 blades with a distance between the blades of 3mm and the test results this is in accordance with the classification from ISO 2409: 2013, the last one was a hardness test using a pencil hardness tester tool. This test relies on pencil hardness from 6B to 6H which is etched at an angle of 45o and a load of 500 grams on the basis of ASTM D3363. From the results of the thickness test there is a slight difference in average where the highest thickness is 183 um with a value of 14% hardener and the lowest is 177.6 um with a value of 12% hardener. The test results for the level of adhesion obtained the highest value ISO class: 0 with a value of 14%, 16%, 18% hardener while the lowest value is with ISO class classification: 1 with a hardener value of 12% and paint and gloss without hardener. The results of the hardness test obtained the highest hardness value 4H with a value of 14%, 16%, 18% hardener and the lowest hardness value is 1 level difference, namely 3H with a value of 12% hardener and paint and gloss without Hardener.

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