PUBLIC REVIEW DRAFT DRAFT UGANDA 
STANDARD  
  DUS DEAS 1052  
First Edition  
2021 -mm-dd 
 
 Reference number  
DUS DEAS 1052:  2021 
© UNBS 2021  
   
Two-pack epoxy zinc phosphate weldable primer — 
Specification  
 
 PUBLIC REVIEW DRAFTDUS DEAS 1052: 2021  
ii                © UNBS  2021  - All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2021  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 7 333 2 50/1/2 
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 
 
  PUBLIC REVIEW DRAFTDUS DEAS 1052: 2021  
© UNBS  2021  - All rights reserved                 iii National foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Ugand a, as amen ded. UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisatio n for Standardisation (ISO),  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry  Point on TBT Agreement of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of repr esentatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews th e comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Draft Uganda Standard, DUS DEAS 1052: 2021 , Two-pack epoxy zinc phosphate weldable primer — 
Specification , is identi cal with and has been reproduced from an East African  Standard, EAS 1052: 2021 , 
Two-pack epoxy zinc phosphate weldable primer — Specification , and adopted  as a Uganda Standard . 
The committee responsible for this document is Technical Committee UNBS/ TC 302, Paints, varnishes and 
related products . 
Wherever the words, “ East African  Standard " appear, they should be replaced by "Uganda Standard ".  DEAS 1052 :2021  
ICS 87.040  
 
 
© EA C 2021                                                                                                                             First Edition 2021  
 DRAFT EAST AFRICAN STANDARD  
Two-pack epoxy zinc phosphate weldable primer — Specification  
EAST AFRICAN COMMUNITY  DEAS 1052 :2021  
ii © EAC 2021 – All rights reserved  
 Copyright notice  
This EAC document is copyright -protected by EAC. While the reproduction of this document by 
participants in the EAC standards  development process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
any other purpose without prior written permission from EAC.  
Requests for permission  to reproduce this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the country of the requester:  
© East African Community 2021 — All rights reserved  
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P.O. Box 1096 , 
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Tanzania  
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       Web: www.eac -quality.net  
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement. 
Violators may be pr osecuted . 
 DEAS 1052 :2021  
© EAC 2021 – All rights reserved  iii 
 Foreword  
Development of the East A frican Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when good s and services are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the Nat ional 
Standards Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders in cluding government, academia, consumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and inc orporated before finalization of standards, in 
accordance with the Principles and procedures for development of East African Standards.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Stand ards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible for this document is Technical Committee EASC/TC 070, Paints, varnishes and 
related products.   
Attention is d rawn to the possibility that some of the elements of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
 DRAFT EAST AFRICAN STANDARD  DEAS 1052 :2021  
 
© EAC 2021 – All rights reserved  1 
 Two-pack epoxy zinc phosphate weldable primer — Specificatio n 
1 Scope  
This Draft East African Standard specifies requirements, methods of sampling  and test for two -pack epoxy 
zinc phosphate weldable primer. This material is used as a base coat for the painting of steel structures 
/equipment where corrosion protection and chemic al resistance under marine atmospheric conditions are 
required.  
2 Normative references  
The following documents are referred to in the text in such a way that some or all of their content constitutes 
requirements of this document. For dated references, only  the edition cited applies. For undated references, 
the latest edition of the referenced document (including any amendments) applies.  
ASTM F735 -17, Standard Test Method for Abrasion Resistance of Transparent Plastics and Coatings Using 
the Oscillating Sand  Method  
ISO 1514,  Paints and varnishes — Standard panels for testing  
ISO 1518 -1, Paints and varnishes — Determination of scratch resistance — Part 1: Constant -loading method  
ISO 1523 , Determination of flash point — Closed cup equilibrium method  
ISO 1524 , Paints, varnishes and printing ink — Determination of fineness of grind  
ISO 2808,  Paints and varnishes — Determination of film thickness  
ISO 2811, (all parts),  Paints and varnishes — Determination of density  
ISO 2812 -1, Paints and varnishes — Determination of resistance to liquids — Part 1: Immersion in liquids 
other than water  
ISO 2813,  Paints and varnishes — Determination of specular gloss of non -metallic paint films at 20°, 60° and 
85° 
ISO 2884 -2, Paints and varnishes — Determination of viscosity using ro tary viscometers — Part 2: Disc or ball 
viscometer operated at a specified speed  
ISO 3251,  Paints varnishes and plastics — Determination of non - volatile matter content  
ISO 3270,  Paints and varnishes and their raw materials — Temperatures and humidities fo r conditioning and 
testing  
ISO 3856 -6, Paints and varnishes — Determination of "soluble" metal content — Part 6: Determination of total 
chromium content of the liquid portion of the paint — Flame atomic absorption spectrometric method  
ISO 4618,  Paints and varnishes — Terms and definitions  
ISO 6503  Paints and varnishes -- Determination of total lead — Flame atomic absorption spectrometric 
method  
ISO 6504 -3, Paints and varnishes — Determination of hiding power — Part 3: Determination of contrast ratio 
of ligh t coloured paints at a fixed spreading rate  DEAS 1052 :2021  
2 © EAC 2021 – All rights reserved  
 ISO 9 117-1, Paints and varnishes — Drying tests — Part 1: Determination of through -dry state and through -
dry time  
ISO 9117 -3, Paints and varnishes — Drying tests — Part 3: Surface -drying test using ballotini  
ISO 11890 -1, Paints and varnishes — Determination of volati le organic compound (VOC) content —Part 1: 
Difference method  
ISO 15528 , Paints, varnishes and raw materials for paints and varnishes — Sampling  
ISO 17132,  Paints and varnishes — T-bend test  
3 Terms and definitions  
For the purposes of this document , the definitions given in ISO 4618 and  the following  apply:  
3.1 
pot life 
maximum time during which a coating material supplied as separate components  should be used after they 
have been mixed together  
 
3.2 
Vola tile organ ic comp ound content 
the mass of the volatile organic compou nds present in a coating  material, as determined  under specified 
condition s 
3.3 
volatile organic compo und (VOC ) 
fundamentally, any organic liquid and/or solid that evaporates spontaneously  at the prevailing  temperature 
and pressure  of the atmosphere with which it is in contact 
3.4 
ready for use 
the state  of a product when it is mixed in accordance  with the manufacturer's  instructions  in the correct 
proportions  and thinned if required using the correct thinners so that it is ready for applicat ion by the 
approved method 
4 Requirements  
4.1 General requirements  
4.1.1  Composition  
4.1.1.1 Two-pack epoxy zinc phosp hate weldable primer shall be epoxy -based. The manufacturer shall 
specify the principal type of binder and the curing agent used  in the paint. The principal anticorrosive  
pigment shall be zinc phosphate. 
4.1.1.2 The two-pack epoxy zinc phosphate weldable primer  shall consist essentially of two components, 
base  and hardener and or a  catalyst  to be mixed  as recommend ed by the manufacturer so as to satisfy all the 
requirements  of this standard. 
4.1.2  Odour  
The two-pack epoxy zinc phosphate weldable primer  shall be odour free after application and upon curing . DEAS 1052 :2021  
© EAC 2021 – All rights reserved  3 
 4.1.3  Condition of material in container  
When visually examined, two pack epoxy zinc ph osphate weldable primer shall be free from skins and lumps. 
The container shall be free from rust and moulds.  
4.1.4 Settling  
The two pack epoxy zinc phosphate weldable primer shall be free from settling. Settling if any, shall be easily 
incorporated by sti rring.  
4.1.5  Application properties  
The two pack epoxy zinc phosphate weldable primer shall be supplied in two containers as a unit. Always mix 
a complete unit in the proportions applied. The application shall be done in accordance with manufacturer’s 
instructions.  
4.2 Specific requirements  
4.2.1  Wet coat 
The wet mixed material shall also comply with the requirements given in the Table 1  when tested in 
accordance with the test methods specified therein . 
Table 1 — Requirements for the wet coat of two pack ep oxy zinc phosphate weldable primer  
S/N Characteristic  Requirement  Test method  
i.  Total l ead content,  ppm, max . 90 ISO 6503  
ii.  Solids content, %,m/m, min.  35 ISO 3251  
iii.  Skin formation  Shall show no skin 
formation  Annex A  
iv.  Viscosity,  pa.s 0.4 – 0.8 ISO 2884 -2, Use spindle No.3  of 
the rotating paddle viscometer at 
100 revolutions per min  
v.  Pot life,  h, max. 8 Annex B 
vi.  Flash  point, min. 30 °C, min. ISO 1523  
vii.  Specific gravi ty at 25 oC 1.25 – 1.55 ISO 2811  
viii.  Hiding Power, %, min . 90 ISO 6504 -3 
ix.  Volatile organi c content, g/l, 
maxim um., 450 ISO 11890-1 
x.  Fineness of dispersion,  
/Fineness of grind Hegman -
Type Gage,µm,  max. 30 ISO 1524  
xi.  Zinc phosphate content, %, 
min. 15 Annex C 
xii.  Drying time at 
25 ˚C ± 2 ˚ C, 
h, max. Hard drying  24 ISO 9117 -1 
Surface drying  4 ISO 9117 -3 
xiii.  Chromium, ppm in dried paints, 
max. 5 ISO 3856 -6 DEAS 1052 :2021  
4 © EAC 2021 – All rights reserved  
  
4.2.1  Dry coat 
The dry coat of the two pack epoxy primer  shall comply with the requirements given in the Table 2 when 
tested in accordance with the test methods specified therein . 
Table 2 — Requirements for the dry coat of  two pack epoxy zinc phosphate weldable primer  
S/N Characteristic  Requirement  Test method  
i.  Dry film thickness per coat  30 µm, min.  ISO 2808  
ii.  Gloss at 600, min. 6 %  ISO 2813  
iii.  Scratch hardness using 15 N  No such scratches sh all 
produce a bare metal  ASTM F735 -17 
iv.  Flexibility and adhesion using 
12 mm mandrel  There shall be no visible 
damage or detachment of film 
after 48 h  ISO 17132  
v.  Resistance to liquids  The film shall not show signs 
of disintegration or change of 
colour to a great extent. The 
loss of gloss shall not be more 
than 50 % of the original gloss  ISO 2812 -1 
 
4.3 Quantity of material  
The quantity of material s hall not be less than the declared volume at 25 0C + 2 0C when tested in accordance 
with Annex D. 
5 Packagin g and marking  
5.1 Packaging  
The two pack epoxy zinc phosphate weldable primer  shall be packed in suitable container that prevents it from 
deterioration during storage, transportation and normal handling . 
5.2 Marking  
5.2.1  Marking on the container  
5.2.1.1  The marking shall be either in English, Kiswahili or French or in combination as agreed between the 
manufacturer and the supplier. Any other language shall be optional . 
5.2.1. 2 Each container shall be marked legibly and indelibly with the following:  
a) The nam e of the product  as “Two-pack epoxy zinc phosphate primer ”; 
b) manufacturer’s name and physical address  
NOTE  The name, physical address of the distributor/supplier and trademark may be added as required . 
c) net content  in L; 
d) date of manufacture;  DEAS 1052 :2021  
© EAC 2021 – All rights reserved  5 
 e) instructions for use;  
f) pot-life life at 25 °C; and 
g) an indication of flammability.  
5.2.2  Marking on the label of the container  
Each label of the container shall be marked legibly and indelibly with the following:  
a) date of manufacture;  
b) instructions for use;  
c) pot-life; 
d) shelf life; 
e) colour ; and 
f) batch number.  
7 Sampling  
Sampling shall be done in accordance with ISO 15528.  DEAS 1052 :2021  
6 © EAC 2021 – All rights reserved  
 Annex A 
(normative)  
 
Examination of skin formation  
A.1 Apparat us 
The following apparatus  are required: 
A.1.1  Container, one metal  container of 250 ml with a tight fitting lid. 
A.1.2  Spatula  
A.2 Test conditions  
The test shall be carried out at a temperature of 23 ºC ± 2 ºC and a relative  humidity  of 65 ± 2 per cent. 
A.3 Procedure 
The procedure shall be as follows: 
A.3.1  Stir and pour 125 ml to 130 ml of the paint into the container, place the lid on tightly and 
momen tarily invert the container  to seal the lid. 
A.3.2  Allow the container to stand upright for 7 days. 
A.3.2  Open the container and test the surface of the paint with a spatula f or any skin formatio n. 
Exami ne the walls and the lid for the presence of the skin.  DEAS 1052 :2021  
© EAC 2021 – All rights reserved  7 
 Annex B  
(normative)  
 
Determination of pot life  
B.1 General  
The time taken to double the viscosity from the original value shall be considered the pot life of the material . 
B.2 Apparatus  
Test panels,  complying with ISO 1514 . 
B.3 Reagents  
Component parts, i.e. base and hardener or catalyst.  
B.4 Procedure  
B.4.1 Thoroughly mix component parts in the ratio specified by the paint manufacturer to give a sample of 
200 mL by volume . 
B.4.2 Within 10 min of mixing , determine the viscosity using a rotating paddle  viscometer.  
B.4.3 Allow the mixed sample of paint to stand in a suitable airtight container and determine viscosity at the 
end of the specified time.  
B.5 Report  
Report whet her viscosity has doubled at 25 °C within 6 h.  DEAS 1052 :2021  
8 © EAC 2021 – All rights reserved  
 Annex C  
(normative)  
 
Zinc phosphate content  
C.1 General  
Metallic zinc is estimated, by determining the total reducing power by dissolving it in acidulated ferric chloride 
solution and titrating with standard potassium permanganate solution.  
C.2 Reagents  
C.2.1  Standard potassium permanganate solution (0.1 N) (KMnO 4) 
Heat 5 g of potassium permanganate (KMnO 4) for one hour at 100 ± 2 0C. Di ssolve 3.16 g of potassium 
permanganate in water and dilute it to 1 L. Allow it to stand for 7 days. Filter t hrough a medium porosity fritted 
disc and standardize against sodium oxalate as follows:  
Dissolve 0.25 to 0.30 g of sodium oxalate in 250 mL of hot water (80 °C to 90 °C) and add 15 mL sulphuric 
acid (1:1). Titrate at once with KMnO 4 solution stirring the liquid rigorously and continuously. The KMnO 4 shall 
not be added more rapidly than 10 to 15 mL/min and the last 0.5 mL to 1 mL shall be added drop wise with 
particular care to allow each drop to be fully decolorized before the next is introduced. The solut ion shall not 
be below 60 °C by the time the end point has been reached. Keep the KMnO 4 solution in a brown glass -
stoppered glass bottle and store in a dark place.  
C.2.2  Ferric chloride solution  
Prepare a solution containing 20 g of ferric chloride (FeCl 3.6H2O) and 20 mL of 20 % sodium acetate solution. 
It is advisable to make up one day’s requirement at a time.  
NOTE  40 mL are required for each determination.  
C.2.3  Sodium acetate solution  
Dissolve 200 g of anhydrous sodium acetate (NaC 2H3O2) or 332 g of NaC 2H3O2.3H 2O  in water and dilute to 1 
litre. 
C.2.4 Zimmerman – Reinhardt solution  
Prepare 1 L of solution containing 67 g of manganese sulphate (MnSO 4.4H 2O), 130 mL of sulphuric acid  
(H2SO 4) (sp. gr. 1.84) and 138 mL of phosphoric acid (85 %).  
C.3 Procedure  
C.3.1 Weigh 0.2 g of the sample of the pigment. Transfer immediately to a dry 600 -mL heavy -wall 
Erlenmeyer flask and add 50 mL of the FeCl 3 solution. Tightly stopper the flask and agitate constantly for 
approximately 15 min. As soon as all zinc dust is di ssolved, add 50 mL of the Zimmerman – Reinhardt 
solution and 250 mL of water. Titrate with 0.1 N KMnO 4 solution.  DEAS 1052 :2021  
© EAC 2021 – All rights reserved  9 
 C.3.2 Make a blank determination, following the same procedure and using the same amounts of all 
reagents except the pigment . DEAS 1052 :2021  
10 © EAC 2021 – All rights reserved  
 Annex C  
(normativ e) 
 
Determination of the quantity of material  
D.1 Apparatus  
D.1.1  Graduated measuring cylinder  
D.1.2  Empty container  
D.2 Procedure  
Measure out the volume of the paint by pouring it into the measuring cylinder and emptying the paint into an 
empty container.  Measure out until all the paint is finished and record the total volume of the paint by adding 
up the volume.  
D.3 Calculation  
The measured volume shall be expressed as follows:  
% of volume measured is 
100
V1VV  
where  
V1 is the total measured  volume;  and 
V is the declared volume.  
 DEAS 1052 :2021  
© EAC 2021 – All rights reserved  11 
 Bibliography  
KS 1992 , Two-pack epoxy zinc phosphate weldable primer — Specification  
 DEAS …. :2021    
 
© EAC 2021  – All rights reserved