DIN 50938 DOWNLOAD FREE

The symbols conform to the standard designations for supplementary treatment for electrodeposited coatings as in DIN EN , except for T Supplementary treatments serve to increase the degree of protection. DIN to which reducing agents or other reagents may have been added. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. Thesaturation of the colour obtained depends on the nature of the base metal substrate , the heat treatment, thesurface preparation and the composition and type of treatment bath. Almost on top of the page it says in English: Specification is DIN [link by ed.

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There shall be no brownish or greenish spots due to an excessiveconcentration or contamination of the coating bath. When components having highly contoured surfaces are tested, the minimum exposure time shall beagreed on a case-by-case basis.

DIN 铁和钢的黑色氧化涂层.要求和试验方法 - MBA智库文档

About four drops of the test solution shall then be applied to a flat area of the coated specimen or component. DIN to which reducing agents or other reagents may have been added. Can you tell us if it specifies a 59038 or neutral salt spray exposure requirement in addition to the weight requirement?

Previous editions DIN Foreword This standard has been prepared by Technical Committee Chemische und elektrochemische?

About four drops of 50398 test solution shall then be applied to a flat areaof the coated specimen or component. No other bath checks are generally needed. Assessment of oxalic acid testAppearance of exposedQuality of coatingcoating areaGrey with light-grey haloInadequateBlack to brownish blackGood1with exposed halo 1 Even good quality coatings may have verybright halos due to metal being exposed at theboundary of the area to which the solution wasapplied.

For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. About three drops of the test solution shall then be applied to a flat area of the coated specimen or component. To meet special requirements, paints or similar coatings may be applied.

It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. Designation of a black oxide coating on a steel Fe component that has not been heat-treated, but has undergone the single-bath coating process A and then waxed T5: The djn news is that the spec is available in both German and English versions. This process provides iron and steel i.

Assessment of oxalic acid test Appearance of exposed coating area Black to brownish black with exposed halo1 1 Quality of coating Grey with light-grey cin Inadequate Good Even good quality coatings may have very bright halos due to metal being exposed at the boundary of the area to which the solution was applied.

DIN 50938 Black Oxide Finish

In some cases, the quality of the coating may be improved by adding other salts to the bath. When components having highly contoured surfaces are tested, the minimum exposure time shall be agreed on a case-by-case basis. The symbols conform to the standard designations for supplementary treatment for electrodeposited coatings as in Idn ENexcept for T Please share the ideas. The customer may provide the following supplementary information: The coating time will also depend on the nature and quality of the components.

DIN - European Standards

Slight changes in hue shall be ignored. Supplementary treatments serve to increase the degree of protection. Depending on the composition, con-centration and temperature of the solution, the coatings will develop in immersion times of between five andtwenty minutes.

In case of doubt, the German-language original should be consulted as the authoritative text. NSS results after black oxidation.

These shall be designated as follows: Designation of a rin oxide coating on a steel Fe component that has not been heat-treated, but hasundergone the single-bath coating process A and then waxed T5: Threaded articles shall be coated asagreed. To determine the loss in mass of steel due to the action of the test solution containing inhibitor, diin, uncoated test sheets or components made of the same material shall be weighed mass m3treated for the 509338 time as the coated component with test dun, dried and reweighed mass m4.

DINArtificial climates in technical applications — Condensation water test atmospheresDINProtective coatings on metals — Concepts, application methods and surface preparationDINElectroplated and chemically applied coatings — Designation and information in technicaldocumentationDINENCorrosion protection of metals — Electrodeposited coatings — Method of specifying generalrequirementsContinued on pages 2 to 5.

The time taken for the surface of this area to be exposed shall not be less than that specified in table 4.