哪位有蓝点法检测标准( MA/H0686-2001标准),谢谢.

哪位有蓝点法检测标准( MA/H0686-2001标准),用在不锈钢酸洗钝化上的,
发至我邮箱:yanzifei@gmail.com           或跟贴.
谢谢.

发现许久之前的帖子， 现在自己更新一下， 以便需要此方面的人 参考。

=======>  在HG20584-1998《钢制化工容器制造技术要求》10.1.4条中规定：表面酸洗钝化的质量，根据需要可采用蓝点法检 测，采用1克赤血盐(铁氰化钾K3[Fe(CN6)])＋3毫升65％～85％HNO3＋100毫升水配制溶液，用滤纸浸渍溶液后，贴附于待测表面或直接将溶液涂刷于待测表面，如表面钝化膜不完善或有铁离子污染，即呈蓝色。

=======> ASTM A967 STANDARD SPECIFICATION FOR CHEMICAL PASSIVATION TREATMENTS FOR STAINLESS STEEL PARTS
18. Practice E—Potassium Ferricyanide-Nitric Acid Test
18.1 This test is recommended when detection of very small amounts of free iron is required. It is recommended for detection of free iron on austenitic 200 and 300 series stainless steels. This test is not recommended for detection of free iron on ferritic or martensitic 400 series stainless steels because these steels will give a positive indication irrespective of the presence or absence of anodic surface contaminants. This test shall not be applied to parts to be used in food processing.
18.2 The test solution is prepared by adding 10 g of chemically pure potassium ferricyanide to 500 mL of distilled water, adding 30 mL of 70 % nitric acid, agitating until all of the ferricyanide is dissolved, and diluting to 1000 mL with distilled water. The test solution shall be mixed fresh on the day of the test.
18.3 The test solution is swabbed on the surface of the sample representing the lot of passivated parts. The formation of a dark blue color within 30 s denotes the presence of metallic iron.
18.4 The tested sample shall not exhibit the dark blue color indicative of free iron on the surface.
18.5 When the test is negative, the surface shall be thoroughly

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