Arti dan tujuan
5.1 Ketebalan lapisan biasanya sangat penting terhadap kinerjanya. For most nonferrous metal coating on the steel, magnetic method for nondestructive measurement of coating thickness is reliable, suitable for specification acceptance testing and SPC/SQC application.

5.2 this test method is not applied to determine the thickness of electrodeposited nickel coating on steel. Test method B530 is suitable for this determination.

ASTM B499-2021 “Metode Uji Pengukuran Ketebalan Lapisan Tak Bermagnet pada Bahan Logam Dasar Magnetik dengan Metode Magnetisasi”

The scope of
1.1 the test methods include the use of magnetic equipment for black metal or other non-magnetic coating thickness on the magnetic base metal nondestructive measurement. It is intended to complement the manufacturer’s instructions for the operation of the instruments and is not intended to replace them.

Catatan 1: contains more than 8% phosphorus autocatalytic deposition ni-p alloy with sufficient non-magnetic, as long as the measured before any heat treatment, can use this kind of test methods for measuring.

1.2 these instruments measure the magnets and magnetic attraction between parent metal, affected by the presence of coating (tergolong sebagai “tarikan magnetis”), or the change of the magnetic flux density inside probe (tergolong sebagai “elektronik”). These instruments cannot distinguish the thickness of individual layers. They can only measure the probe the cumulative thickness, and all layers below until the base metal.

ASTM B499-2021 “Metode Uji Pengukuran Ketebalan Lapisan Tak Bermagnet pada Bahan Logam Dasar Magnetik dengan Metode Magnetisasi”

1.3 Measurements made according to this test method will comply with the requirements of ISO International Standard 2178.

1.4 unit – ke satuan SI dianggap standar. The values given in the brackets are for reference only.

1.5 Standar ini tidak dimaksudkan untuk mengatasi semua masalah keselamatan, jika ada, terkait dengan penggunaannya. Pengguna standar ini bertanggung jawab untuk menetapkan keselamatan yang sesuai, praktik kesehatan dan lingkungan dan untuk menentukan penerapan pembatasan peraturan sebelum digunakan.

1.6 standar internasional ini merupakan hambatan teknis dalam perdagangan, menurut komite organisasi perdagangan dunia yang dikeluarkan “tentang menetapkan standar internasional, pedoman dan rekomendasi keputusan asas” penetapan prinsip-prinsip standardisasi yang diakui secara internasional.