The GBT 10125-2012 standard for salt spray testing is developed in accordance with the guidelines provided by GB/T 1.1-2009. This updated version replaces the previous GB/T 10125-1997 standard titled "Artificial Atmosphere Corrosion Test - Salt Spray Test." Compared to its predecessor, GBT 10125-2012 introduces several key improvements and updates.
One of the major changes includes an expanded scope of application, now covering a broader range of materials and coatings. The normative references have been revised to reflect current industry practices and standards. Additionally, the concentration of the sodium chloride solution has been adjusted, with more detailed instructions on how to properly adjust the pH value of the solution.
The minimum volume of the salt spray test chamber has been increased to at least 0.4 cubic meters, ensuring more consistent and reliable test results. The requirements for the salt spray device have also been clarified and supplemented, providing better guidance for equipment setup and operation.
The standard now includes specific provisions for re-use conditions, as well as enhanced methods for corrosion testing under different scenarios, such as AASS, CASS, and NSS tests. These include modifications to pretreatment procedures, test duration, and post-test handling.
New requirements have been introduced for organic coating test panels, and the placement of test samples has been adjusted for better accuracy. Additional test conditions and post-test treatment methods have been added to improve the overall testing process.
Furthermore, the evaluation methods for organic coatings have been expanded, and the standard now requires more detailed test reports. Several appendices have been added or revised, including design sketches of the salt spray chamber, a supplementary method using zinc reference samples, and additional information on test panels and reference steel grades.
This standard is an equivalent translation of ISO 9227:2006, "Artificial Atmosphere Corrosion Test - Salt Spray Test." It also includes Appendix NA, which lists Chinese documents that are consistent with the international standards referenced in this standard.
Editorial changes were made to align the document with domestic standards, such as removing the preface from ISO 9227:2006 and replacing "this International Standard" with "this standard." These revisions ensure clarity and consistency in the application of the standard.
The standard was proposed by the China Machinery Industry Federation and is managed by the National Technical Committee for Standardization of Metal and Non-Metallic Coatings (SAC/TC 57). It was drafted by several leading institutions, including Wuhan Materials Protection Research Institute, Maanshan Dingtai Rare Earth Technology Co., Ltd., and Wuhan University, among others.
Key contributors to the development of this standard include Zhang Yan, Jiang Lei, Liu Shuo, Shi Zhimin, and many other experts in the field.
Previous versions of this standard include GB/T 10125-1997 and GB/T 10125-2012/ISO 9227:2006. The latest edition provides a more comprehensive and up-to-date framework for conducting salt spray tests, ensuring higher quality and reliability in corrosion evaluation.
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