Nugroho, Carolus Trijatmiko (2016) Pengaruh Material Abrasif Pada Blasting Terhadap Kekuatan Lekat Cat Dan Ketahanan Korosi Di Lingkungan Air Laut. Undergraduate thesis, Institut Technology Sepuluh Nopember.
Preview |
Text
4312100136-Undergraduate_Thesis.pdf - Accepted Version Download (3MB) | Preview |
Abstract
Coating merupakan proses pelapisan pada permukaan profil material dengan suatu lapisan film
organik maupun anorganik. Coating lebih sering digunakan pada industry karena lebih
ekonomis dan lebih mudah digunakan. Namun teknik ini pun tidak lepas dari berbagai masalah.
Masalah yang timbul dari teknik ini sebagian besar disebabkan karena buruknya proses surface
preparation yang dapat mengurangi daya lekat cat. Buruknya proses surface preparation dapat
disebabkan berbagai hal antara lain ukuran mesh dari material abrasif yang tidak pas, pemilihan
material abrasif, hingga kesalahan teknik dalam melakukan proses ini. Penelitian ini dilakukan
untuk menganalisa pengaruh dari material abrasif terhadap kekuatan lekat cat di material A36
yang diberikan variasi jenis material abrasif alumunium oxide, steel grit, dan volcanic sand,
kemudian material di coating dengan cat jenis epoxy dan zinc rich. Hasil dari pengujian
menunjukan bahwa peningkatan kekerasan material abrasif meningkatkan kekasaran
permukaan pada substrat. Nilai rata-rata kekasaran permukaan yang tertinggi adalah material
yang di blasting dengan steel grit yaitu sebesar 84.71 μm. Meningkatnya kekasaran permukaan
akan menambah daya lekat cat dengan substrat, yang juga akan meningkatkan ketahanan korosi
pada material. Nilai daya lekat tertinggi pada material yang di coating dengan cat jenis epoxy
dan zinc rich berturut-turut sebesar 20.04 MPa dan 21.46 MPa, dimana material tersebut di
blasting dengan menggunakan steel grit. Hasil dari pengujian salt spray NaCl 3.5% selama 72
jam, dan 168 jam pada material menunjukan material yang di blasting dengan steel grit tetap
memiliki nilai daya lekat yang tertinggi. Nilai daya lekat tertinggi setelah uji salt spray selama
72 jam pada material yang di coating dengan cat jenis epoxy dan zinc rich berturut-turut sebesar
14.15 MPa dan 15.04 MPa, sedangkan Nilai daya lekat tertinggi setelah uji salt spray selama
168 jam pada material yang di coating dengan cat jenis epoxy dan zinc rich berturut-turut
sebesar 11.91 MPa dan 12.80 MPa.
==========================================================================================================
Coating is a covering that is applied to the surface of an object, usually referred to as the
substrate. Commonly, coating is used in the industry because it is more economical and easier
to used. However, this technique is also has a lot of problems. Problems arise from these
techniques due to poor surface preparation process that can reduce the adhesion of paint. A
poor surface preparation process can be caused by various things including a mesh size of
abrasive material, abrasive material selection, and human errors. This research was
conducted to analyze the effect of abrasive material for blasting against the adhesive strength
of the paint in ASTM A36 which was blasted with varying abrasive material i.e aluminum
oxide, steel grit, and volcanic sand, and was coated with different paint types i.e epoxy paint
and zinc rich paint. The results showed that the increasing of abrasive material hardness can
increase the surface roughness. And increasing surface roughness will increase adhesion of
paint to the substrate, which will improve the corrosion resistance of the material. The highest
surface roughness value , 84.71 μm, and the highest adhesion value in specimens which coated
with epoxy paint and zinc rich paint, consecutively 20.04 MPa and 21.46 MPa possessed by
the specimens which use steel grit as an abrasive material for blasting. The results of salt spray
testing with NaCl 5% for 72 hours, and 168 hours on the specimens shows that specimens
which blasted with steel grit still has the highest adhesion values. The highest adhesion value
after the salt spray test for 72 hours in specimens which coated with epoxy paint and zinc rich
paint, consecutively 14.15 MPa and 15.05 Mpa. While the highest adhesion value after the test
salt spray for 168 hours on the material in the coating with epoxy paint and zinc rich painted
consecutively 11.91 MPa and 12.80 MPa.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 627.74 Nug a |
| Uncontrolled Keywords: | Coating, Blasting, Material Abrasif, Steel Grit, Salt Spray |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 17 Jan 2020 08:48 |
| Last Modified: | 17 Jan 2020 08:48 |
| URI: | http://repository.its.ac.id/id/eprint/72723 |
Actions (login required)
 |
View Item |