Dahulu bertugas sebagai Metallurgist di sebuah kilang swasta antarabangsa di Ipoh. Pengkhususan tugas dalam bidang 'melting' perleburan keluli dan besi, rawatan haba (heat treatment), failure analysis (kajian kegagalan logam).

Kemudian bertugas sebagai jurutera di sebuah kilang magnesium smelting, bertanggungjawab dalam pengawalan proses utiliti dalam seksyen boiler (dandang),
jet vacuum pump, LPG dan compressed air system.

Kembali ke kilang lama sebagai Moulding Engineer (Head Of Department).....dunia logam dunia kerja saya...

Selepas itu berhijrah ke dunia Elektrokimia sebagai Production Engineer di Yuasa Battery. Masih dalam bidang metalurgi iaitu mendalami tabiat plumbum dan beberapa logam seperti antimoni dan Tin.

Menyediakan laman ini untuk bekalan bahan kajian dan bacaan kejuruteraan logam dalam bahasa melayu. Menjunjung aspirasi kejayaan tamadun negara bangsa melalui penataran bahasa eka, Metalurgis-Melayu akan bekerja ke arah itu. Terdapat mungkin beberapa laopran kerja saya akan diubah bahasa daripada bahasa Inggeris ke Bahasa Melayu. Moga ia dimanfaatkan.

Thursday, September 18, 2014

Contoh Muqaddimah laporan penyiasatan masalah yang saya buat - Dry Charge Battery Performance Issue

Dry Charge Battery Performance Issue
Prepared by : Nuruddin ( Production Engineer)
Date : 28th Jan 14

Dry Charge battery should  perform cranking performance more than 60 days.



Theoretical:

A. Control at dryer positive
  1. Dry-charged batteries suffer the most energy losses after formation, while the wet-charged batteries are less affected.
  2. Thermopassivation
    1. Discharge voltage of the battery decreased with increase of the drying temperature.

(1) 25-80 C = low temperature region. The plates retain their energy, in terms of both mean discharge voltage and discharge time.

(2) 80-220 C = thermopassivation region. Thermopassivated plates retain their capacity, but the energy and power of the battery are reduced.

(3) > 250 C = thermal disintegration region. A lot of PbO formed (semiconductor layer).

B. Control mositure content

According to : Lead-Acid Batteries: Science and Technology: Science and Technology, D. Pavlov (page 546)

Moisture positive form recommend = < 0.2 % 

Moisture negative form and saparator recommend = < 0.05 % 

During storage, with high humidity in container,
  • Oxygen evolved at positive plate during storage.
  • The oxygen react with humidity oxidize Pb to PbO.
  • Especially negative plate will effected (pure lead)
  • The PbO react with residual H2SO4 to form PbSO4 (passivation layer)




1 comments:

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