Standard No.:	HG/T 3334-2012
English Name:	General Test Methods for Cataphoretic Coatings
Chinese Name:	电泳涂料通用试验方法
Professional Classification:	HG    Professional Standard - Chemistry
Issued by:	MIIT
Issued on:	2012-11-7
Implemented on:	2013-3-1
Status:	valid
Superseding:	HG/T 3335-1977 Determination Method for Conductivity of Electrophoretic Paint
Language:	English
File Format:	PDF
Word Count:	10000 words
Price(USD):	250.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the test method specific to cataphoretic coatings. This standard is applicable to cathodic cataphoretic coatings and anodic cataphoretic coatings. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reference, the latest edition (including all the amendments) applies. GB/T 601-2002 Chemical Reagent - Preparations of Standard Volumetric Solutions GB/T 1725-2007 Paints Varnishes and Plastics - Determination of Non-volatile-matter Content GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods GB/T 9271-2008 Paints and Varnishes Standard Panels for Testing GB/T 23989-2009 Determination for the Solvent Resistance of Coatings by Solvent Rubs 3 Preparation of Cataphoretic Coatings 3.1 Preparation of cataphoretic coating working solution Prepare the cataphoretic coating working solution according to the preparation process provided by the product supplier. The preparation water shall meet the requirements of the tertiary water specified in GB/T 6682. 3.2 Substrate and substrate processing

Foreword i 1 Scope 2 Normative References 3 Preparation of Cataphoretic Coatings 4 Determination Method 4.1 Conductivity of Cataphoretic Coatings 4.2 pH Value 4.3 Throwing Power of Cataphoretic Coatings 4.3.1 Ford Box Method 4.3.2 4-panel Method 4.3.3 Glass Tube Method 4.3.4 Steel Tube Method A 4.3.5 Steel Tube Method B 4.4 Coulombic Efficiency of Cataphoretic Coating 4.5 Deposition of Cataphoretic Coating 4.6 Nonvolatile Matter 4.7 Ash Content 4.8 Pigment/Binder Ratio of Cataphoretic Coatings 4.9 Precipitability 4.10 Screenings 4.11 Heating Loss 4.12 Gel Fraction 4.13 MEQ 4.13.1 Determination of MEQ Value (Expressed by Working Solution) 4.13.2 Determination of MEQ Value (Expressed by Resin) 4.14 L-effect 4.15 Re-solubility 4.16 Breakdown Voltage 4.17 Curing Property 4.18 Solvent Content Figure 1 Cataphoretic Device Figure 2 Ford Box Test Device Figure 3 4-panel Test Device Figure 4 Coating Test plates Used in the 4-panel Method Figure 5 Glass Tube Test Device Figure 6 Test Device for Steel Tube Method A Figure 7 Test Device for Steel Tube Method B