도금 전처리공정에서 맞춤형 알칼리계 탈지제 개발

이승범; 정구형; 이재동; Seung-Bum Lee; Koo-Hyung Joeng; Jae-Dong Lee

Applied Chemistry for Engineering, Vol.21, No.3, 301-305, June, 2010

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도금 전처리공정에서 맞춤형 알칼리계 탈지제 개발

Development of Alkaline Degreasing Agent for Electroplating Pretreatment Process

이승범 , 정구형¹, 이재동^†

경원대학교 환경에너지공학전공
¹(주)중앙피엔피 연구개발팀

Seung-Bum Lee , Koo-Hyung Joeng¹, and Jae-Dong Lee^†

Division of Energy & Biological Engineering, Kyungwon University, Gyeonggi 461-701, Korea
¹R&D Center, ChungAng P&P Co., Ltd., Inchon 405-848, Korea

E-mail:

초록

본 연구에서는 도금전처리 공정에서 사용되는 다양한 조성의 맞춤형 알칼리계 탈지제를 개발하고, 탈지제의 수명을 예측함으로 효율을 높임과 동시에 공정품의 불량을 줄이고자 하였다. 알칼리계 탈지제는 침지형 탈지제로 NaOH, Na2CO3, Na2SiO3, SLS 등을 일정비율로 첨가하여 제조하였으며, 제조된 탈지제의 성능평가를 위해 알칼리계 탈지액의 온도를 40∼50 ℃로 설정하여 30∼40 min 동안 오염된 철 시편을 넣은 후 오염물을 제거하였다. 오염물이 제거된 시편은 물방울 맺힘실험과 Hull-cell 도금분석을 통해 탈지제의 성능 및 수명을 확인하였다. 최적 탈지제의 조성은 NaOH (30 g/L) + SLS (6.0 g/L) + Na2SiO3 (2.0 g/L) + Na2CO3 (40 g/L)을 추천할 수 있으며, 물방울맺힘 실험과 Hull-cell 도금분석 결과 최적 탈지조건은 50 ℃, 35 min인 것으로 나타났다.

In this study, the alkaline degreasing agent was developed for electroplating pretreatment process, and the efficiency and the durability was predicted. The alkaline deeping degreasing agent was prepared by blending sodium hydroxide (NaOH), sodium carbonate (Na2CO3), sodium silicate (Na2SiO3), and sodium lauric sulfate (SLS). The performance tests of the degreasing agent were evaluated in the 40∼50 ℃ of the degreasing temperature and 30∼40 min of the degreasing time. The efficiency and durability of the prepared degreasing agent were tested by the waterdrop formation test and Hull-cell plating test. The optimum ratio of alkaline degreasing agent was NaOH (30 g/L) + SLS (6.0 g/L) + Na2SiO3 (2.0 g/L) + Na2CO3 (40 g/L). Also, the optimum degreasing conditions were 50 ℃ of the degreasing temperature and 35 min of the degreasing time.

Keywords:alkaline degreasing agent;Hull-cell plating test;waterdrop formation test;degreasing ratio

[References]

Mamiya F, The Technology of Metal Cleaning, Maki-Shoten, Tokyo (1971)
Spring S, Metal Cleaning, Reinhold Publishing, New York (1963)
Kimura M, Komaki M, Nakajima T, Nakahara H, Fukuda K, J. Am. Oil Chem. Soc., 67, 698 (1990)
Park HS, Im WB, Ahn CI, J. Korean Ind. Eng. Chem., 6(5), 910 (1995)
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[Related Articles]

[1] Mamiya F, The Technology of Metal Cleaning, Maki-Shoten, Tokyo (1971)

[2] Spring S, Metal Cleaning, Reinhold Publishing, New York (1963)

[3] Kimura M, Komaki M, Nakajima T, Nakahara H, Fukuda K, J. Am. Oil Chem. Soc., 67, 698 (1990)

[4] Park HS, Im WB, Ahn CI, J. Korean Ind. Eng. Chem., 6(5), 910 (1995)

[5] Park ES, Chung DJ, Park HS, Hahm HS, J. Korean Oil Chem. Soc., 20, 81 (2003)

[6] Bird RW, Metal Finishing, 93, 10 (1995)

[7] Bernett TW, Krebs HW, Ceramic Eng. Sci. Process, 11, 443 (1990)

[8] Fellows P, Finishing Industries, 2, 22,24,50, May 5 (1978)

[9] Smith ML, Fellows PL, Product Finishing, 29, 12 (1976)

[10] Kwon GH, J. Korea Society of Environmental Administration, 11, 305 (2005)

[11] NIOSH, Special Occupational Hazard Review with Control Recommendations Trichloroethylene, US Dept. of Health Education and Welfare Public Health Services, 1-59 (1978)

[12] Jansen G, Tervoort J, Galvanotechnik, 73, 580 (1982)

[13] Japan Oil and Fats Co., Surfactant Handbook, 430-433, Kogaku Tosho Co., Tokyo (1987)