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SETTING INSTALASI OKSIDASI ALUMINIUM


    H2O      = 95% vol                NaOH = 25 gr                       H2O     = 95% vol                H2O    = 85 -- 90% vol                Larutan pewarna        Uap air        Mengusap
                                                                                                                                                                                     dengan kain
    H2SO4 = 5% vol                    H2O    = 250 ml                    HNO3 = 5% vol                    H2SO4 =0 -- 15% vol                   Temperatur = 700C   Waktu = 5 mnt     halus dan
                                                                                                                                                                                    meletakkan di
    Temp. = 60 – 800C                 Temp. = 30 –500C                   Temp. = 27 –350 C                Temp. = Variasi
                                                                                                                                                                                    tempat kering
    Waktu = 3—5 Mnt                   Waktu = 6 – 10 mnt.                Waktu = 3—5 Mnt                  Waktu = Variasi



      DEGREASING                            ETCHING                            DESMUTING                    OKSIDIZING                            COLORISING         SEALING        DRYING


                                                            Air suling                       Air suling                            Air suling
                         Air suling
                                                                                                                                                                                             PRODUK


                         RINSING                            RINSING                          RINSING                               RINSING

                                                                                              Gambar 1 Proses colorising

Tujuan
Degreasing      : Langkah pertama untuk proses pre-treatment. Degreasing bertujuan untuk menghilangkan minyak atau lemak di permukaan aluminium sebelum proses anodizing

Etching         : Bertujuan untuk mengholangkan lapisan oksida aluminium (Al2O3) di permukaan aluminium.

Desmuting       : Bertujuan untuk membersihkan noda hitam akibat reaksi dari paduan aluminium dengan soda api saat proses etching.

Rinsing         : Bertujuan untuk menghilangkan sisa-sisa zat kimia yang terbawa oleh proses sebelumnya. Rinsing menggunakan air murni (destilated water) dan dilakukan untuk setiap akhir pre- treatment
                  (degreasing, eatching, desmuting, aksidizing)

Calorising      : Pemberian warna pada pori-pori lapisan oksida yang terbentuk akibat proses oksidizing.

                                                                                                                1
Sealing   : Meningktkan ketahanan korosi, menahan warna agar tetap di dalam pori, meningkatkan kerataan warna.

Drying    : Mengeringkan benda kerja setelah proses sealing.




                                                                           Anode (+)        Catode (-)




                 Batttery Charger




                                                 Aluminium part




                                                                     Electrolyte solution                  Lead plate



                                                 Gambar 2 Instalasi anodizing

                                                                                                2

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Setting instalasi oksidasi aluminium

  • 1. SETTING INSTALASI OKSIDASI ALUMINIUM H2O = 95% vol NaOH = 25 gr H2O = 95% vol H2O = 85 -- 90% vol Larutan pewarna Uap air Mengusap dengan kain H2SO4 = 5% vol H2O = 250 ml HNO3 = 5% vol H2SO4 =0 -- 15% vol Temperatur = 700C Waktu = 5 mnt halus dan meletakkan di Temp. = 60 – 800C Temp. = 30 –500C Temp. = 27 –350 C Temp. = Variasi tempat kering Waktu = 3—5 Mnt Waktu = 6 – 10 mnt. Waktu = 3—5 Mnt Waktu = Variasi DEGREASING ETCHING DESMUTING OKSIDIZING COLORISING SEALING DRYING Air suling Air suling Air suling Air suling PRODUK RINSING RINSING RINSING RINSING Gambar 1 Proses colorising Tujuan Degreasing : Langkah pertama untuk proses pre-treatment. Degreasing bertujuan untuk menghilangkan minyak atau lemak di permukaan aluminium sebelum proses anodizing Etching : Bertujuan untuk mengholangkan lapisan oksida aluminium (Al2O3) di permukaan aluminium. Desmuting : Bertujuan untuk membersihkan noda hitam akibat reaksi dari paduan aluminium dengan soda api saat proses etching. Rinsing : Bertujuan untuk menghilangkan sisa-sisa zat kimia yang terbawa oleh proses sebelumnya. Rinsing menggunakan air murni (destilated water) dan dilakukan untuk setiap akhir pre- treatment (degreasing, eatching, desmuting, aksidizing) Calorising : Pemberian warna pada pori-pori lapisan oksida yang terbentuk akibat proses oksidizing. 1
  • 2. Sealing : Meningktkan ketahanan korosi, menahan warna agar tetap di dalam pori, meningkatkan kerataan warna. Drying : Mengeringkan benda kerja setelah proses sealing. Anode (+) Catode (-) Batttery Charger Aluminium part Electrolyte solution Lead plate Gambar 2 Instalasi anodizing 2