STD 5732,105 外层镀锌 Y105 颜色
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Electroplated coatings of zinc with chromating Y 105 OrientationAs to its technical content, this standard conforms to ISO 4042 and SS 3191 for threaded parts and to ISO 2081 and SS 2968 for non-threaded parts.This standard does not apply to parts delivered to Volvo Car Corporation after 2005-07-31. For these parts, standard VCS 5737,19, VCS 5737,29 or VCS 5732,1059 applies within Volvo Car Corporation.This issue differs from issue 9 in that the term bright chromating has been changed to bright passivation and new text has been added under Orientation.The standard has also been given a new layout. The note: “The English language version is the original and the reference in case of dispute” has also been added.Contents1 Scope2 Definitions3 Standardized coating thicknesses and designations4 Application5 Requirements5.1 Appearance5.2 Adhesion5.3 Coating thickness5.4 Corrosion resistance5.5 Heat treatment - hydrogen embrittlement5.6 Chromating5.7 Hexavalent chromium content6 Indication on drawing1 ScopeThis standard covers electroplated coatings of zinc with chromating for protection of threaded andnon-threaded parts of iron and steel against corrosion.外层镀锌Y105 颜色目录1范围2定义3镀层厚度标准及说明4应用5要求5.1外观5.2粘附5.3镀层厚度5.4抗腐性能5.5热处理-氢脆5.6染色5.7六价铬含量6在图纸中的标注1范围2 DefinitionsFor the purpose of this standard, the following definitions apply.Significant surface: the part of the article covered or to be covered by the coating and for which the coating is essential for serviceability and/or appearance.If necessary, the significant surface shall be indicated on drawing and standard sample. See alsoSTD 5730,21.Measuring area: the area of the significant surface over which a single measurement is made.Reference area: the area within which a specified number of single measurements is required to be made. See figure 1 for threaded parts.Local thickness: the mean of the thickness measurements, of which a specified number is made within a reference area.Minimum local thickness: the lowest value of the local thicknesses found on the significant surface of a single article.White rust: white porous corrosion tubercle on the surface of zinc or a zinc alloy.Basis metal corrosion (red rust): corrosion of the basis metal on (electro) plated parts.2定义本标准使用以下定义重要表面:测量区域:参考区域:厚度:最小厚度:3 Standardized coating thicknessesand designationsTable / 表13镀层厚度标准及说明The designation comprises:a) the chemical symbol Fe for the basis metal (iron or steel) followed by an oblique stroke, Fe/b) the chemical symbol for zinc, Znc) a number indicating the minimum thickness, in micrometers, of the zinc coatingd) symbols indicating the designation of the chromate conversion coating whereC1 = bright passivationC2 = yellow chromatingC3 = green chromatingC4 = black chromating4 ApplicationElectro-zincplating is used as general protection of iron and steel against corrosion. The protection is directly proportional to the zinc coating thickness. Chromating enhances the resistance of the zinc coating against corrosion (white rust).In table 2, the recommended types of coating for various service conditions are specified. a)化学符号Fe 以Fe/标识b)c)锌最小厚度mmd)铬酸盐转化层符号C1 =亮色钝化处理C2 =染黄C3 =染绿C4 =染黑4应用镀锌用于对铁和钢的防腐保护,这个保护程度直接与锌层厚度相关,染色提高了锌层防腐(白锈)的能力。
在表格2明确了各种情形下建议的层类。
1) Only to be applied when subsequent phosphating and EC paint application shall be carried out. The unchromated coatings shall be protected during transportation by, e.g., anti-rust treatment as perY 700-1, STD 5771,7.5 Requirements5.1 AppearanceThe significant surface of the electroplated part shall be free from clearly visible plating defects such as blisters, pits, roughness, cracks or unplated areas. See section 5.7 ”Chromating” for appearance of the chromate layer.5.2 AdhesionThe coating shall adhere well and must not show any blisters or any tendency to peel or flake off in connection with burnishing test as per STD 5712,104.5.3 Coating thickness5.3.1 Threaded partsThe coating shall comply with the requirements for local thickness as in table 3. The local thickness shall be measured with a method whose measuring error does not exceed ± 10 %. For reference tests, the microscope method as per STD 5714,104 shall be used.Concerning limits of size, refer to STD 5081,15.1)该部分仅当将要进行磷化处理和使用EC油漆时适用未染色层在运输过程中要注意保护，如按照标准Y 700-1, STD 5771,7.进行防锈处理。
5要求5.1外观电镀部分的重要表面应无明显可见的电镀缺陷，如：气泡、凹陷、粗糙点、裂缝或未镀区域，参见5.7部分。
5.2粘附镀层应粘附良好，并且出现气泡或者在磨光试验中确定出现脱落倾向，磨光试验根据STD 5712,104.5.3层厚5.3.1螺纹部分镀层应与表格3的局部层厚相一致，局部层厚使用一种测量误差不超过± 10 %的方法测量。
