Analisa Pengaruh Pretreatment Sandblast Pelapisan Fireproofing Coating Terhadap Uji Laju Korosi Adhesi dan Struktur Mikro Pada Material Baja SS400 dan S45C

Penelitian kali ini menjelaskan tentang perbedaan yang terjadi pada pelapisan finish fireproofing dan finish coating material logam SS400 dan S45C dengan pretreatment sandblasting pada kondisi awal korosi permukaan yang berbeda berdasarkan ISO 8501-1 : 2007. Perlakuan pretreatment sandblasting kepada material logam dapat mempengaruhi tingkat Laju Korosi, kekuatan Adhesi lapisan fireproofing maupun coating, dan Struktur Mikro material yang terlapisi. Tekanan penembakan dilakukan secara konstan dengan tekanan 8.5 bar dan hasil kekasaran permukaan SA 2 ½ . Pelapisan material menggunakan metode spray coating konstan dengan tekanan 3.5 bar. Pengelompokan finish fireproofing dan finish coating dibedakan berdasarkan jenis coating yang dipakai. Jenis coating yang dipakai Interseal 670HS, Interchar 2060 (fireproofing), dan Interthane 990. Dari hasil penelitian menunjukan kondisi awal korosi permukaan sangat berpengaruh terhadap hasil Uji Laju Korosi dan Uji Adhesi coating. Untuk Uji Adhesi, pelapisan fireproofing finish dan coating finish menujukan lebih didominasi coating finish. Sedangkan pengujian SEM-EDX memperkuat hasil Uji Laju Korosi dengan didapatkanya unsur Cl./ This study describes the differences that occur in the fireproofing finish coating and SS400 and S45C metal material finish coating with sandblasting pretreatment at different initial surface corrosion conditions based on ISO 8501-1: 2007. Sandblasting pretreatment treatment for metal materials can affect the corrosion rate, the strength of the adhesion of the fireproofing and coating layers, and the microstructure of the coated material. The firing pressure was carried out constantly with a pressure of 8.5 bar and the result of surface roughness was SA 2 . The coating of the material uses a constant spray coating method with a pressure of 3.5 bar. Fireproofing finishes and coating finishes are classified based on the type of coating used. The type of coating used is Interseal 670HS, Interchar 2060 (fireproofing), and Interthane 990. The results of the study show that the initial conditions of surface corrosion greatly affect the results of the Corrosion Rate Test and Coating Adhesion Test. For the adhesion test, the fireproofing finish and the coating finish show that the coating finish is dominated by the coating finish. While the SEM-EDX test strengthens the results of the Corrosion Rate Test by obtaining the element Cl