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博文

目前显示的是 九月, 2019的博文

ISO 17025 and CNAS

ISO17025 is the international standard for laboratory accreditation services; the latest version is released in May, 2005. The full name of ISO/IEC17025:2005-5-15 is Accreditation Criteria for the Competence of Testing and Calibration Laboratories. ISO17025 standard is the laboratory management standard formulated by the international Standardization Organization ISO/CASCO (Conformity Assessment Committee). Internationally the organization that manages laboratory accreditation is International Laboratory Accreditation Cooperation (ILAC), attended by 44 laboratory accreditation institute including CHINA NATIONAL ACCREDITATION COMMITTEE FOR LABORATORIES (CNACL). ISO17025 standard mainly includes: definitions, organization and management, quality system, audits and reviews, personnel, accommodation and environmental conditions, equipment and reference materials, traceability and calibration, calibration and test methods, sample management, record, certificate and report, subcontracti...

SUS304 Stainless steel surface clean and maintenance method

SUS304 Stainless steel is a metal that is not easy to rust, but it is not a metal that will never rust. It may also be contaminated and rusted depending on the conditions of use or the environment in which it is used.  D aily maintenance  is very necessary.   SUS304 Stainless steel products have excellent corrosion resistance and are less to rust, as described above, which contain chromium components. In the air, combined with oxygen to form a strong surface and form a dense non-oxidizing film, this non-oxidizing film can prevent the oxidation of the steel surface (rust), and can play a protective surface to prevent corrosion of various corrosion factors. Therefore, if the film is damaged due to some corrosion, and the chromium and oxygen cannot be combined, the stainless steel material will start to rust. However, as long as the cause of corrosion is eliminated and the chromium is combined with oxygen, the non-oxidized film is again produced and the corrosion resist...